Candle Wax Calculator: Jar Size, Fragrance Load, Wick Size and Burn Time
The only candle calculator that starts with your jar and works backwards, giving you exact wax weight, fragrance ounces, wick sizing, pour temperatures, burn time, and cost per candle all in one place. No guessing at the craft store ever again.
🫙 Jar Volume → Wax Weight🌸 5 Wax Types🔥 Wick Sizing Chart⏱️ Burn Time Estimate💰 Cost per Candle📄 PDF Recipe Card
🕯️ Wax Type
🫙 Container Setup
fl oz
Common: 4, 8, 10, 12, 16 oz
jars
inches
Leave blank to auto-estimate from volume
🌸 Fragrance Load
8%
Safe range for Soy Wax (464/GB): 6–10%
💰 Cost Calculator (optional)
$/ lb
$/ oz
$each
$each
📊 Recipe Analysis
🕯️
Select your wax type, enter your jar size, and click Calculate My Recipe to get exact wax weight, fragrance ounces, wick recommendation, burn time estimate, and cost breakdown.
Ingredient Breakdown
Candle Making Math: Start with Jar Volume, Work Backwards to Wax Weight
Here is a mistake that trips up almost every beginner candle maker in America: they start by deciding how many pounds of wax to melt, then pour it into jars and hope for the best. The professional approach runs in the opposite direction. You start with the jar, figure out exactly how much wax fills it to the right level, then scale that number up for however many candles you are making. This calculator does that math automatically so you never waste a single ounce of wax or come up short mid-pour.
The reason jar volume does not directly equal wax weight is something called the fill factor. A fluid ounce of empty space in a glass jar and a fluid ounce of melted wax are two different things. When soy wax cools and solidifies, it contracts slightly, and its density means roughly 0.82 ounces of solid wax fills each fluid ounce of container space. Paraffin is denser at about 0.86 ounces per fluid ounce. Beeswax is the densest common candle wax at around 0.90 ounces per fluid ounce. Use the wrong conversion and you either underfill your jars and get a visible gap at the top, or you overfill and waste product that overflows during the pour. This calculator applies the correct fill factor for each wax type automatically.
The Fill Factor Problem Most Online Guides Skip Over
A popular shortcut you will see on craft blogs is the “1:1 rule”, one fluid ounce of container equals one ounce of wax. That is close enough for rough planning but off by 10 to 18 percent depending on your wax. On a six-candle batch of 10-ounce mason jars, that error means you could pour with anywhere from a half pound too much or too little wax. At the craft store level with soy wax running $3 to $5 per pound, that is real money. At production scale, say 100 candles for a holiday market, the error can cost you 10 to 15 pounds of wax, which could be the difference between breaking even and losing money.
Professional chandlers also account for the top-off pour. Most soy and coconut wax blends form a slight sink hole or depression in the center as they cool, requiring a second thin pour to level the surface. Factor in roughly 5 to 10 percent extra wax for that second pour, especially if you are working with 100 percent soy. This calculator’s wax weight output gives you the baseline per jar, and the fragrance and wick guidance helps you plan the full production run from a single screen.
How This Candle Wax Calculator Works
The tool is built around five variables that define every candle recipe: wax type, container volume, fragrance load percentage, wick diameter, and cost inputs. Here is exactly what happens behind the scenes when you click calculate.
Step One: Jar Volume to Wax Weight Conversion
The calculator multiplies your jar volume in fluid ounces by the fill factor for your selected wax type. For soy wax the factor is 0.82, meaning an 8 fl oz jar needs 6.6 oz of soy wax. For paraffin that same jar needs 6.9 oz. Beeswax, being the densest, needs 7.2 oz. This per-jar number then multiplies by your batch size to give you total wax needed in both ounces and pounds, exactly what you need to order or weigh on your kitchen scale.
Step Two: Fragrance Load Calculation
Fragrance oil amount is calculated as a percentage of wax weight, not jar volume. If your soy wax per jar is 6.6 oz and you are using an 8 percent fragrance load (the industry standard recommendation for most soy waxes), you need 0.53 oz of fragrance oil per candle. This is why proper candle calculators work from wax weight rather than jar size, the fragrance load formula only makes sense when applied to wax. The calculator also checks your entered fragrance percentage against the safe recommended range for your specific wax type and flags anything outside that window. Loading a paraffin candle with 14 percent fragrance oil, for example, can cause seeping, fire hazards, and fragrance that pools on top of the candle rather than dispersing through the wax.
Step Three: Wick Recommendation by Diameter and Wax Type
Wick sizing is the most commonly botched part of candle making. Too small a wick and you get tunneling, the candle burns down the center leaving a thick ring of unmelted wax around the edges. Too large a wick and you get a flame that is dangerously tall, produces soot, and can crack your glass container from the heat. The right wick depends on two things: the diameter of your container at the wax line, and what wax you are using. The calculator cross-references container diameter (estimated from your jar volume if you leave the diameter field blank) against a database of ECO, CD, CDN, LX, and zinc core wick series to recommend the correct starting point. Note that “starting point” is key, every batch should still be test-burned to verify, but this recommendation puts you in the right neighborhood immediately rather than burning through six wick sizes to find it.
Step Four: Burn Time Estimate
Estimated burn time is based on the wax type’s average burn rate per ounce of wax. Soy wax burns at approximately 8 to 8.5 hours per ounce, making it the go-to choice for long-lasting candles. Pure coconut wax is similar. Paraffin burns faster at around 7 hours per ounce because it releases scent more aggressively. Beeswax is the marathon runner of candle waxes at approximately 10 hours per ounce, which is why it commands a premium price. These are approximations based on industry benchmarks and will vary with wick size, fragrance load, and room conditions. The burn time shown is the low end of the range, with the actual likely range 10 percent higher.
Step Five: Cost Per Candle Breakdown
If you enter your material costs, wax per pound, fragrance oil per ounce, jar cost, and wick cost, the calculator produces a complete cost per candle. This is essential for anyone selling at craft fairs, farmers markets, or on Etsy. Most beginner candle sellers price by feel or by looking at competitors, which is dangerous. You need to know your cost of goods before you set a price, and that cost needs to include a fair margin for your time. A typical small-batch candle selling for $18 to $25 at a craft fair should have a materials cost of $4 to $7 to leave room for profit after booth fees, packaging, and time.
US Candle Makers in Action: Three Real Batch Calculations
Understanding the Five Most Popular US Candle Wax Types
Walking into a craft supply store like Joann, Michaels, or an online supplier like CandleScience or Bulk Apothecary, you will find at least a dozen wax options. Most of them fall into five categories, each with distinct properties that affect every number in your recipe.
Soy wax is the most popular choice for home candle makers and Etsy sellers in the United States. The most common type is Golden 464 (also sold as GB464), a container soy wax that stays creamy and pourable down to around 95°F. It holds fragrance well at 6 to 10 percent, burns cleanly, and supports itself without a metal wick sustainer because the wax grips the wick firmly when set. The downside is frosting, a white, powdery bloom that appears on the surface, which is purely cosmetic but can put customers off if they expect a pristine look. Soy wax typically costs $2 to $5 per pound in the US depending on quantity and supplier.
Paraffin wax is the wax most commercial candle manufacturers use because it is inexpensive, reliable, and holds very high fragrance loads (up to 12 percent with the right grade). IGI 4630 is a widely used container paraffin. Paraffin has the strongest cold throw of any common wax and does not frost. However, it is a petroleum byproduct, which matters to consumers who prefer natural materials. Paraffin typically runs $1.50 to $3 per pound, making it the most cost-effective option for high-volume production.
Coconut wax is the premium option gaining traction in the US market. It has a creamy, naturally white appearance, an incredibly smooth top pour (minimal sink holes or frosting), and exceptional hot throw, arguably the best of any natural wax. The challenge is sourcing: coconut wax is harder to find and runs $5 to $10 per pound at retail. It also tends to be soft and can melt in a warm car or mailbox in summer, which matters if you are shipping candles. Coconut wax blends with soy at ratios like 80/20 or 70/30 to give you the best of both, smooth tops, natural sourcing, and reasonable cost.
Beeswax is the oldest candle-making material in human history. US beeswax is available in yellow (natural color from the hive) and white (filtered) grades. It has the highest melting point of any common candle wax, burns the longest per ounce, naturally produces a honey scent, and emits negative ions when burning that some people believe help with air purification. The tradeoff: beeswax is expensive ($8 to $20 per pound), does not hold as much fragrance as other waxes, and requires heavier wicks. It is ideal for natural, premium, and artisan candle lines where the story behind the wax is part of the product.
Coconut-soy blends are pre-formulated mixtures sold by suppliers like CandleScience (Natural Luxe Blend) and Wooden Wick Co. They are designed to give you coconut wax performance at closer to soy wax pricing. These blends are popular among mid-market Etsy sellers because they produce a smooth top, strong scent throw, and natural appeal without the coconut wax sourcing headaches. Fragrance loads of 8 to 10 percent work well with most blends.
The Fragrance Load Formula and Why It Is Based on Wax Weight
Every candle fragrance formula starts with this single equation: fragrance oil (oz) = wax weight (oz) × fragrance load percentage. The load percentage is always applied to wax weight, never to the finished candle weight or the jar volume. This trips up beginners who see a 10-ounce jar and think they need 10 percent of 10 ounces (1 oz) of fragrance. In reality, a 10 fl oz jar holds about 8.2 oz of soy wax, and 10 percent of that is 0.82 oz of fragrance oil. The difference matters when you are scaling to 100 or 200 candles.
The safe fragrance load range is set by your wax manufacturer, not by general internet guidelines. CandleScience publishes detailed maximum fragrance recommendations for every wax they sell. Aztec Candle has the same. The numbers in this calculator are industry benchmarks, but your specific wax product documentation should always be your primary reference. Exceeding the safe load causes fragrance oil pooling, seeping through the glass wall, clogging the wick, or in worst cases creating a fire hazard as unbound fragrance oil collects in the melt pool.
Austin, TX: Etsy Shop
Holiday Soy Candle Batch
Jar10 fl oz mason jar
Wax typeSoy 464
Batch size24 jars
Wax needed12.3 lbs
Fragrance (8%)15.7 oz total
Burn time est.~70 hours
Cost per candle~$5.40
Nashville, TN: Craft Fair Seller
Beeswax Pillar Candle
Jar4 fl oz votive tin
Wax typeNatural beeswax
Batch size50 tins
Wax needed11.25 lbs
Fragrance (4%)7.2 oz total
Burn time est.~36 hours
Cost per candle~$4.80
Portland, OR: Home Studio
Luxury Coconut Wax Jar
Jar16 fl oz straight-sided
Wax typeCoconut-Soy blend
Batch size12 jars
Wax needed9.96 lbs
Fragrance (10%)15.9 oz total
Burn time est.~105 hours
Cost per candle~$8.20
Three Expert Tips Every Candle Maker Should Know
Planning Your First Candle Batch: A Step-by-Step US Buying Guide
Before you spend money on supplies, use this calculator to run three or four scenarios so you know exactly what to order. Here is how a successful first batch comes together in the United States, with realistic pricing from major US candle supply vendors.
A good beginner batch is 12 to 24 candles in a single size, say, a 9 oz straight-sided jar. This gives you enough candles to run proper burn tests on several, still have product left to sell or gift, and see how your fragrance selections actually smell when burning. Twelve 9 oz jars need approximately 6.6 lbs of soy wax. A 10 lb bag of Golden 464 from CandleScience costs around $28, leaving you leftover wax for your next batch. At 8 percent fragrance load on 6.6 lbs of wax (105.6 oz of wax), you need 8.4 oz of fragrance oil per scent. A 4-ounce fragrance oil sampler gets you two scents at roughly 0.3 to 0.5 oz per ounce of fragrance. For 8 to 9 oz of fragrance, buy a half pound (8 oz) of your chosen scents.
Nine-ounce straight-sided jars from Uline or Berlin Packaging run about $1.00 to $1.50 each at retail quantities (case of 12). Cotton wick kits with tabs run about $12 to $15 for 100 wicks, or about $0.12 to $0.15 each. Add a $10 digital kitchen scale (1 gram accuracy), a $8 pour pot, and a $6 thermometer and you are set. Your entire first batch materials cost should run $60 to $90 for 24 candles, about $2.50 to $3.75 per candle before labor. Selling them at $15 to $20 each, your materials margin is healthy.
01
Always Add Fragrance by Weight, Never by Volume
Fragrance oils have different densities. One fluid ounce of a heavy musk fragrance can weigh 1.1 ounces while a light citrus might weigh 0.95 ounces. Always use a kitchen scale to measure fragrance in ounces or grams. Adding by a measuring spoon or eyeballing ruins the load percentage calculation and can make your candle unsafe or weak-smelling.
02
Burn-Test Before You Batch
Make one candle first and test it through three complete burn cycles before you commit to a large batch. A proper burn test means burning it until the melt pool reaches the edge of the container on the first burn (usually 3 to 4 hours), letting it fully solidify, then repeating twice more. This confirms your wick size is right before you make 50 candles with the wrong wick.
03
Watch Flash Point on Your Fragrance Oils
Every fragrance oil has a flash point, the temperature at which it can ignite if exposed to an open flame. Many citrus and light florals have flash points around 150°F or lower. You must add fragrance when your wax is below that flash point. Paraffin is typically added fragrance at 160°F+, which can exceed low-flash-point fragrances. Check every fragrance oil’s SDS (Safety Data Sheet) before mixing.
Candle Wax Questions: What American Craft Makers Ask Most
Multiply your jar’s volume in fluid ounces by the fill factor for your wax type. For soy wax use 0.82, for paraffin use 0.86, for beeswax use 0.90. So a 10 fl oz jar with soy wax needs 8.2 ounces of wax. This calculator does that conversion automatically once you enter your jar size and select your wax type.
Most chandlers use 6 to 10 percent for soy wax, with 8 percent being the most common starting point. Going below 6 percent often produces weak cold throw and no hot throw. Going above 10 percent with most soy waxes causes the fragrance oil to separate from the wax and pool on top, creating a fire hazard and a candle that smells fine cold but produces no scent when burning. The specific soy wax you buy may have its own manufacturer recommendation, which should take priority over general guidelines.
Wick size is determined primarily by the diameter of your container and secondarily by your wax type. A 3-inch diameter jar with soy wax typically uses an ECO-6 or CDN-16 wick. The same jar with paraffin might use an LX-18. Container diameter, not volume, is what matters for wick sizing because the wick needs to create a melt pool that reaches the container walls. This calculator estimates diameter from your jar volume if you do not enter it directly, or you can measure your jar with a ruler for better accuracy. Always purchase a wick sampler and burn-test before committing to a large order.
That is called frosting and it is a natural characteristic of soy wax, it is not a defect. Frosting is caused by the natural polymorphism of vegetable waxes, meaning the fatty acids in soy wax recrystallize on the surface over time. It does not affect the burn, scent throw, or quality of the candle. Many customers actually associate frosting with natural, additive-free soy wax. If you want to minimize it, pour at a lower temperature (around 100 to 110°F), cool in a warm room, and avoid direct sunlight or drafts on cooling candles.
For most soy waxes, add fragrance oil when the melted wax has cooled to 135 to 140°F. Adding it too hot (above 160°F) burns off lighter aromatic compounds, weakening scent. Adding it too cool (below 120°F) prevents the fragrance from fully binding with the wax, causing separation. Stir slowly for two full minutes after adding fragrance to ensure thorough binding before pouring. For fragrance oils with flash points below 140°F, add at 5 to 10 degrees below that flash point.
Candle dye is used in such small amounts that it does not meaningfully change your wax weight calculation. Liquid candle dye is typically used at 1 to 2 drops per pound of wax. Dye blocks or chips are generally 0.1 ounce per pound of wax for medium saturation. Neither amount significantly changes the total wax weight for ordering purposes. However, always add dye before fragrance oil since dye requires high temperatures to fully dissolve, and adding fragrance first would mean you then need to reheat to dissolve dye, which burns off aromatics.
Soy candles generally burn 30 to 50 percent longer than comparable paraffin candles because soy wax has a lower melting point and burns at a cooler, slower rate. A soy candle with 8 oz of wax might burn 60 to 70 hours. A paraffin candle with the same 8 oz might burn 50 to 56 hours. Beeswax outlasts both, burning at about 10 hours per ounce because of its higher density and natural components. The actual burn time depends heavily on wick size, fragrance load, and how the candle is burned, but these are solid estimates for planning and labeling.
Cold throw is how strongly a candle smells when it is unlit and at room temperature. Hot throw is how strongly it scents the room when burning. Most candle buyers experience cold throw first when smelling candles at a store or market, but hot throw is what determines customer satisfaction. Soy wax has excellent hot throw but moderate cold throw. Paraffin typically has strong cold and hot throw. Coconut wax is known for exceptional hot throw with a clean, even melt pool. Beeswax has the subtlest throw of all because it binds fragrance less aggressively, which is why beeswax fragrance loads stay low at 2 to 6 percent.
The standard pricing formula in the handmade goods industry is materials cost multiplied by three to four, plus a fair hourly wage for your time. If your materials cost $6 per candle, your price should be $18 to $24 minimum before accounting for labor. At a craft fair or on Etsy where you also pay booth fees, shipping, and platform fees, many small chandlers use a five times materials multiplier to remain profitable. Use the cost calculator section of this tool to get your actual materials cost per candle, then apply your desired markup on top of that baseline.
Yes, blending waxes is one of the most common ways to customize candle properties. A popular blend is 80 percent soy and 20 percent paraffin, the soy gives longer burn and clean burn properties while the paraffin strengthens cold throw and reduces frosting. Coconut and soy blends are common in premium candles because they offer very smooth tops and exceptional hot throw. When blending, the fill factor will be somewhere between the two component waxes’ individual factors. For a 50/50 soy-paraffin blend, use a fill factor of approximately 0.84. This calculator handles five preset wax types including a coconut-soy blend option.
Wet spots in glass container candles are not actually wet, they are spots where the wax pulled away from the glass as it cooled and contracted. The glass is transparent so you can see the gap. This is purely cosmetic and does not affect burn quality or scent. It is more common with soy and natural waxes because they contract more aggressively than paraffin. To reduce wet spots, warm your jars in a low oven (170°F) before pouring, pour at the lower end of your recommended temperature range, and cool slowly away from drafts or air conditioning vents.
In most US states, once you sell goods, even at a single craft fair, you are technically required to collect and remit sales tax. The threshold for needing a formal business structure (sole proprietorship, LLC) varies by state, but the IRS expects you to report hobby income if it exceeds $600 in a year on most platforms. If you sell at physical markets, many state departments of revenue require a seller’s permit regardless of volume. The SBA’s website at sba.gov has state-by-state small business licensing guides. This is not legal or tax advice, consult a CPA familiar with your state’s craft seller regulations.
Essential oils can be used in candles but with important caveats. Most essential oils have very low flash points, some citrus oils flash below 100°F, well below safe pour temperatures. Using essential oils at standard 8 to 10 percent fragrance loads in candles can cause fire hazards, wick clogging, and very short scent life when burning since aromatics burn off rapidly. If you use essential oils, keep loads at 3 percent or below, choose oils with flash points above 140°F (many florals and woodsy oils), and thoroughly research each oil’s IFRA safety guidelines. Many experienced chandlers use a blend of fragrance oil as the base with a small percentage of essential oil added for naturals marketing appeal.
The International Fragrance Association (IFRA) sets usage guidelines for fragrance ingredients in consumer products to prevent allergic reactions and skin sensitization. Reputable US fragrance oil suppliers include IFRA compliance documentation with their fragrance oils, specifying the maximum safe usage percentage for candles, soaps, and skin products. For candles specifically, most IFRA limits are high enough that normal candle-making fragrance loads (6 to 12 percent) are well within compliance. If you sell candles, buy only from suppliers who provide up-to-date IFRA certificates and SDS sheets for every fragrance. This protects your customers and limits your liability.
Yes, in the United States, any candle sold commercially must carry a warning label per the ASTM F2417 standard. Required warnings include “Never leave burning candle unattended,” “Keep away from children and pets,” “Keep away from flammable materials,” and “Stop burning when only 1/2 inch of wax remains.” These warnings are not optional even for small-scale craft sellers. Many candle supply companies sell pre-printed warning labels. You should also list your business contact information on the label. Check the CPSC (Consumer Product Safety Commission) at cpsc.gov for the current standard and any updates.
A standard 6-foot craft fair table can display 40 to 60 candles comfortably. Most experienced craft sellers bring 1.5 to 2 times their target sales in inventory, so if you aim to sell 30 candles, bring 45 to 60. For your first market, batch 30 to 40 candles across 2 to 3 different sizes and 4 to 6 scents to see what your local market responds to. Use this calculator’s batch sizing feature to work backwards from how many candles you need to the exact pounds of wax and ounces of fragrance to order. Give yourself at least two weeks before the market for a proper cure time, most soy and coconut candles benefit from a 1 to 2 week cure to develop full scent throw.
Always trim your wick to exactly 1/4 inch before every single burn, this is the single most important candle care habit. A wick longer than 1/4 inch produces an oversized flame that consumes wax too fast, burns hotter than the glass can safely handle, and causes black soot to deposit on the jar walls. At the end of each burn session, check the wick tip: if it has formed a mushroom-shaped carbon ball, let the wax cool completely, remove the mushroom with scissors or a wick trimmer, and trim to 1/4 inch before the next burn. Include a printed care card with every candle you sell, “trim wick to 1/4 inch before each burn”, to dramatically improve customer reviews and reduce complaints. Stop burning when 1/2 inch of wax remains (required by ASTM F2417) to prevent the glass from superheating and potentially shattering.
The biggest change at scale is cost-per-pound. A 200-candle soy batch needs roughly 55 pounds of wax. At that quantity, your per-pound cost drops from the $3.50 to $5 retail range to around $2 to $3 with 50-pound case pricing from most US suppliers. Fragrance oils bought by the pound (16 oz) rather than by the ounce typically run 20 to 40 percent less per ounce. A production run that costs $600 at hobby prices might cost $380 at small business prices, dropping your material cost per candle from $3 to $1.90. That turns a $15 candle from a 5x materials markup to nearly 8x. When your annual sales approach $10,000 on Etsy or at craft markets, consult a bookkeeper familiar with crafts businesses. Most US states require sales tax collection from your very first sale, and the IRS hobby loss rules require income reporting once you earn consistently.
The first and most common mistake is treating fluid ounces and weight ounces as the same thing. A jar holding 8 fluid ounces does not hold 8 weight ounces of wax, always multiply jar volume by the wax fill factor to get the correct wax weight. The second mistake is skipping the top-off pour: soy wax sinks in the center as it cools, and you need 5 to 10 percent extra wax budgeted for that second leveling pour. The third mistake is calculating fragrance load incorrectly, it is always a percentage of wax weight, never of jar volume or total candle weight. If you have 9.5 oz of wax at 8 percent, you need 0.76 oz of fragrance oil (round to 0.8 oz). The fourth mistake is adding fragrance at the wrong temperature. Too hot and the aromatic top notes burn off before the wax even sets, leaving a candle with weak scent. Always add fragrance at the temperature specified by your wax supplier, typically 130 to 140°F for soy, then stir slowly in one direction for two full minutes before pouring.
The calculations provided by this Candle Wax Calculator are based on industry-standard fill factors, fragrance load guidelines published by major US wax suppliers, and wick sizing benchmarks compiled from ECO, CDN, LX, and CD wick manufacturer documentation. Results are starting-point estimates and not a substitute for batch testing. Fragrance load safe ranges vary by specific wax product, fragrance oil type, and supplier, always consult your wax supplier’s documentation and the IFRA certificate for your specific fragrance oils before production. Burn time estimates are approximations based on average industry benchmarks and will vary with ambient conditions, wick trimming, burn duration, and fragrance load.
Candle safety labeling requirements described in this content are based on CPSC guidelines and ASTM F2417 standards current as of publication. Standards may be updated, verify with the Consumer Product Safety Commission directly for current requirements. Candle safety warnings, labeling requirements, and sales regulations referenced in the FAQ section are provided for general educational purposes only and are subject to change. Business registration, sales tax collection, and income reporting requirements discussed are general educational information only and vary by state. Consult a licensed CPA and attorney familiar with your state’s small business regulations for advice specific to your situation.
USCalculators.com is an independent, free calculator resource. We have no commercial relationships with any wax suppliers, fragrance vendors, or candle supply companies mentioned or implied in this content. All external links to government and regulatory sites are provided for informational purposes only. Tool content is periodically reviewed but may not reflect the most current manufacturer specifications or regulatory changes.