Cups to mL Converter: US Cup vs Metric Cup vs FDA Cup, Recipe Scaling, and Barista Coffee Ratio Decoder
1 US cup = 236.5882365 mL exactly (8 fl oz x 29.5735 mL). Convert cups to mL for cooking, baking, and specialty coffee. Three cup standards explained: US customary (236.588 mL), metric cup (250 mL), FDA legal (240 mL). Built-in barista ratio calculator for pour-over, espresso, French press, cold brew. 16 fraction presets. Free PDF. WhatsApp share.
Cups to mL
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Formula and Reference
The Three American Cup Standards That Confuse Every Recipe: US Customary, Metric, and FDA Legal
Ask a home baker in Nashville, a nutritionist in San Francisco, and a home cook in Sydney what “1 cup” means, and you will get three different answers: 236.588 mL, 240 mL, and 250 mL. All three are valid, all three are in everyday use, and confusing them can ruin a bread loaf or throw off a nutrition calculation. The one that matters for most Americans reading US recipe books and cooking blogs is the US customary cup: exactly 236.5882365 mL, derived from 8 US fluid ounces at 29.5735295625 mL per ounce. That is the value on nearly every US measuring cup set sold at Target, Williams Sonoma, or Walmart.
The FDA legal cup (240 mL) is used exclusively on US nutrition labels under 21 CFR 101.9. When a cereal box says “serving size 1 cup (240 mL),” the 240 mL figure is the FDA-defined serving size unit, not the volume you would measure with a standard US measuring cup (236.588 mL). The difference is small (3.41 mL, or 1.4%) but it explains why you cannot reconcile nutrition label calculations with cup-measure conversions using the same number. FDA nutrition labeling guidance at FDA.gov/food. FDA 21 CFR Part 101 at eCFR.gov.
The metric cup (250 mL) is the legal cup standard in Australia (via the National Measurement Act), Canada, and used in UK recipe books from the 1990s onward. When Ina Garten says “2 cups of chicken broth” and specifies 480 mL in parentheses, she is using 240 mL (FDA cup). When a recipe from Delicious Australia says “2 cups of flour” and specifies 500 mL, they mean 250 mL metric cups. This matters because 2 US cups (473 mL) of flour versus 2 Australian cups (500 mL) of flour is a 27 mL difference, which in a bread loaf recipe can affect gluten development and the hydration ratio. NIST unit conversions at NIST.gov. Australia’s National Measurement Institute at measurement.gov.au.
How This Three-Mode Cups to mL Calculator Works for Cooks, Bakers, and Baristas
Mode 1: Single Cups to mL
Enter any cup value, including fractions (type 0.333 for 1/3 cup or use the preset). Choose the cup standard: US customary (236.5882365 mL), metric (250 mL), or FDA legal (240 mL). Output: milliliters, fluid ounces, tablespoons, teaspoons, and liters. A cross-reference line shows the equivalent in all three cup standards so you can see the difference at a glance. 16 presets cover every common fraction from 1/8 cup through 16 cups (1 gallon). The bar chart compares your input to four recipe reference sizes: 1/4 cup, 1 cup, 2 cups, and 4 cups.
Mode 2: Coffee Ratio Decoder
Enter the weight of coffee in grams and select the brew method. The calculator preloads the standard ratio for that method (e.g., 1:15 for pour-over, 1:2 for espresso, 1:5 for cold brew concentrate) and lets you adjust it. Output: water needed in mL, US cups, and fl oz. A reference table shows water needed for the same coffee dose across all 8 brew methods simultaneously, so you can see how changing the method changes the water volume. The chart visualizes the water requirement across methods. Based on SCA (Specialty Coffee Association) brew ratio standards. SCA Brewing Control Chart at SCA.coffee. National Coffee Association brewing guide at NCAUSA.org.
Mode 3: Batch Cups to mL
Enter up to 20 cup values, one per line. Output: a table with mL, fl oz, tablespoons, and liters for each. Useful for recipe developers scaling an entire recipe from US cups to metric mL for a European food publication, or for a meal prep cook converting a week’s list of ingredient volumes.
US Cup Measurement Reference Table: Common Recipe Fractions, Tablespoons, and mL Equivalents
| Cups | mL (US cup) | fl oz | tbsp | tsp | Common Recipe Use |
|---|---|---|---|---|---|
| 1/8 cup | 29.588 mL | 1 fl oz | 2 tbsp | 6 tsp | Oil, butter pat, small sauce addition. Exactly 1 US fl oz. |
| 1/4 cup | 59.147 mL | 2 fl oz | 4 tbsp | 12 tsp | Oil, honey, maple syrup, cream. Half a standard coffee measure. |
| 1/3 cup | 78.863 mL | 2.67 fl oz | 5 tbsp + 1 tsp | 16 tsp | Butter, sugar, milk in quick breads and muffins. |
| 1/2 cup | 118.294 mL | 4 fl oz | 8 tbsp | 24 tsp | Butter (1 stick = 1/2 cup), sour cream, small smoothie. |
| 2/3 cup | 157.725 mL | 5.33 fl oz | 10 tbsp + 2 tsp | 32 tsp | Less common. Cake and cookie recipes for oil or buttermilk. |
| 3/4 cup | 177.441 mL | 6 fl oz | 12 tbsp | 36 tsp | Cream, juice, broth additions. Japanese “1 cup” = 200 mL (note: different standard). |
| 1 cup | 236.588 mL | 8 fl oz | 16 tbsp | 48 tsp | Standard US recipe unit. 8 fl oz. 0.5 pint. “1 cup” on US measuring cups. |
| 1.5 cups | 354.882 mL | 12 fl oz | 24 tbsp | 72 tsp | Large sauce pan addition. Same as 1 standard US beer can (355 mL). |
| 2 cups | 473.176 mL | 16 fl oz | 32 tbsp | 96 tsp | 1 US pint. Standard broth carton = 4 cups (1 quart). Party punch base. |
| 4 cups | 946.353 mL | 32 fl oz | 64 tbsp | 192 tsp | 1 US quart. Standard broth carton. Instant Pot minimum fill for most recipes. |
| 8 cups | 1,892.706 mL | 64 fl oz | 128 tbsp | 384 tsp | 1/2 US gallon. Large soup pot. Cold brew half-batch water (for 100g at 1:5 ratio: 500 mL = 2.11 cups). |
| 16 cups | 3,785.412 mL | 128 fl oz | 256 tbsp | 768 tsp | 1 US gallon. Large batch lemonade, stock, or party punch. Canning jar water bath. |
Formula: mL = cups x 236.5882365 (exact US customary cup). 1 US cup = 8 US fl oz = 16 tbsp = 48 tsp = 236.5882365 mL. Source: NIST.gov. US cups vs metric cups: 1 US cup / 1 metric cup = 236.5882365 / 250 = 0.9464.
Coffee Brew Ratio Reference: Water in mL and US Cups for Common Doses
| Brew Method | Standard Ratio | Water for 20g Coffee | Water for 30g Coffee | Water for 60g Coffee |
|---|---|---|---|---|
| Espresso | 1:2 | 40 mL (0.17 cups) | 60 mL (0.25 cups) | 120 mL (0.51 cups) |
| Moka Pot | 1:7 | 140 mL (0.59 cups) | 210 mL (0.89 cups) | 420 mL (1.77 cups) |
| AeroPress | 1:8 | 160 mL (0.68 cups) | 240 mL (1.01 cups) | 480 mL (2.03 cups) |
| French Press | 1:13 | 260 mL (1.10 cups) | 390 mL (1.65 cups) | 780 mL (3.30 cups) |
| Pour-Over / V60 | 1:15 | 300 mL (1.27 cups) | 450 mL (1.90 cups) | 900 mL (3.80 cups) |
| Chemex | 1:15 | 300 mL (1.27 cups) | 450 mL (1.90 cups) | 900 mL (3.80 cups) |
| Auto Drip (SCA Golden Cup) | 1:17 | 340 mL (1.44 cups) | 510 mL (2.16 cups) | 1,020 mL (4.31 cups) |
| Cold Brew Concentrate | 1:5 | 100 mL (0.42 cups) | 150 mL (0.63 cups) | 300 mL (1.27 cups) |
Water volumes are for dry weight ratios (1g coffee : n mL water). SCA Golden Cup standard: 8.25g/150mL = 1:18.2. Source: SCA.coffee. NCA brewing guide: NCAUSA.org. Brew ratios affect extraction yield (target: 18-22% SCA), not just volume. Water temperature: 195-205°F (90.5-96.1°C) per SCA and NCA standards.
Three Real US Examples: Nashville Baker Scaling a Cake, Seattle Barista Dialing a Pour-Over, and Denver Meal Prep Cook Converting European Broth Recipe
Example 1: A Nashville Home Baker Tripling a White Cake Recipe for a Wedding Rehearsal Dinner
Batch: 2 cups flour = 473.18 mL. 1.5 cups sugar = 354.88 mL. 0.5 cup butter = 118.29 mL. Triple batch: 6 cups flour = 1,419.53 mL. 4.5 cups sugar = 1,064.65 mL. 1.5 cups butter = 354.88 mL. Total liquid: 1 cup milk = 236.59 mL per batch, so triple = 708.76 mL.
Nashville home baker Jennifer is making a classic white layer cake for her sister’s rehearsal dinner. Her tested single-batch recipe calls for 2 cups flour, 1.5 cups granulated sugar, 0.5 cup butter, 1 cup whole milk, and 2 teaspoons vanilla. She needs to triple the recipe to fill three 9-inch cake layers.
Triple batch: 2 x 3 = 6 cups flour = 6 x 236.5882365 = 1,419.53 mL. 1.5 x 3 = 4.5 cups sugar = 1,064.65 mL. 0.5 x 3 = 1.5 cups butter (3 sticks, each stick = 0.5 cup = 118.29 mL) = 354.88 mL. 1 x 3 = 3 cups milk = 709.76 mL. Professional bakers always recommend weighing flour by the gram when scaling up: 1 cup all-purpose flour = 120-130g (varies by scooping method). 6 cups = 720-780g. Use a kitchen scale for consistency. USDA food measurement at FDC.nal.usda.gov lists all-purpose flour at 125g per cup (sifted). King Arthur Flour: 120g per cup, spooned and leveled.
Example 2: A Seattle Home Barista Calibrating a V60 Pour-Over at 1:15 Ratio with 42g of Coffee
Coffee Ratio: 42g x 1:15 = 630 mL water = 2.663 US cups. Bloom: 42 x 2 = 84 mL (first pour, 30-45 seconds). Second pour: 630 – 84 = 546 mL in 2 additional pours over 2-2.5 minutes. Target brew time: 3-3.5 minutes total.
Seattle graphic designer and home barista Marco has just purchased a bag of washed Ethiopian Yirgacheffe (light roast). The roaster’s tasting notes suggest a 1:15 ratio for clarity. He is brewing a full-sized V60 (size 03) and uses 42g of coffee. How much water does he need, and how should he pour it?
Coffee ratio: 42g x 15 = 630 mL total water = 2.663 US cups. Starting water temperature: 200°F (93.3°C) for light roast. Bloom: 2 x coffee weight = 84 mL, pour evenly over the bed, wait 30-45 seconds for CO2 outgassing. Remaining: 630 – 84 = 546 mL in 3-4 circular pours spaced 30-45 seconds apart, total brew time 3:00-3:30. If the brew runs faster (under 2:45): grind finer or pour more slowly. If slower (over 4:00): grind coarser. SCA extraction yield target: 18-22%. A 1:15 ratio with correct grind size and water temperature will typically land at 19-20% extraction. SCA Brewing Standards at SCA.coffee. Water quality guidelines: SCA Water Quality Report. NCA brewing guide at NCAUSA.org.
Example 3: A Denver Meal Prep Cook Scaling a French Lentil Soup from a European Recipe Using mL to US Cups
Batch: 1,500 mL broth = 1,500 / 236.5882365 = 6.34 US cups. 400 mL diced tomatoes = 1.69 cups. 200 mL red wine = 0.845 cups. 100 mL heavy cream = 0.423 cups. Total liquid: 2,200 mL = 9.30 US cups. Note: metric cups (250 mL) would give different answer – 2,200/250 = 8.80 metric cups. Always confirm which cup standard the recipe uses.
Denver meal prep enthusiast Patricia is using a French lentil soup recipe from a Paris food blog. The recipe specifies: 1,500 mL vegetable broth, 400 mL canned diced tomatoes, 200 mL dry red wine, 100 mL heavy cream. She is doubling the recipe for her weekly meal prep and wants to use standard US measuring cups.
Single batch conversions: 1,500 mL = 1,500 / 236.5882365 = 6.34 US cups of broth. 400 mL = 1.69 cups (round to 1 and 2/3 cups). 200 mL = 0.845 cups (round to 3/4 cup + 1 tablespoon). 100 mL = 0.423 cups (round to just under 1/2 cup). Double batch: 1,500 mL x 2 = 3,000 mL = 12.68 cups broth (approximately 12 and 2/3 cups). For a recipe at this scale, it is more practical to measure in 250 mL (1 metric cup) increments or, even better, weight-based cooking: 1,500 mL water-based broth weighs approximately 1,500g (1 mL water = 1g). USDA FoodData Central nutrient data at FDC.nal.usda.gov. Safe food preparation and storage at FoodSafety.gov.
Five Expert Tips: Cup Standard Confusion in Baking, SCA Brew Ratios, Instant Pot Minimum Fill, Japanese Cup Differences, and Why Bakers Weigh Instead of Measuring
Tip 1: Why Baking Recipes Fail When You Mix Up US, Metric, and FDA Cup Standards
A 1-cup measurement looks the same in every measuring cup, but the actual volume varies: US customary = 236.59 mL, FDA legal = 240 mL, metric (AU/CA/UK) = 250 mL. For savory cooking, a 5.6% difference between US and metric cups is negligible in a soup or stir-fry. For bread baking, it is not. A French bread recipe calling for “500 mL (2 metric cups) of bread flour” at 100% hydration means 500g water : 500g flour. If you use 2 US cups (473 mL) of flour instead of 500 mL, you have about 27 mL (5.4%) less flour, which raises the effective hydration to about 105%, producing a noticeably slacker and stickier dough. The reverse is also true: if an Australian cookie recipe calls for “1/2 cup (125 mL) of butter” and you use a US 1/2 cup measure (118 mL), you are getting slightly less fat than intended, which can affect spread and texture. King Arthur Baking flour weight guide at KingArthurBaking.com. USDA FoodData Central for ingredient weights at FDC.nal.usda.gov.
Tip 2: The SCA Golden Cup Standard and Why Your Home Drip Coffee Tastes Weak
The SCA (Specialty Coffee Association) defines the “Golden Cup” brew standard as 8.25 grams of coffee per 150 mL of water (a 1:18.2 ratio), yielding a brew strength of 1.15-1.35% TDS (total dissolved solids) and an extraction yield of 18-22%. Most home drip machines use the instruction “1 tablespoon per 6-ounce cup,” which equals about 5-7g coffee per 177 mL water, a 1:25 to 1:35 ratio, far outside the Golden Cup range. This produces under-extracted, weak coffee. To fix it: use 1 rounded tablespoon (10-11g) per 6 fl oz (177 mL) for a 1:16-1:18 ratio. Or: 10g per 175 mL water. In US cup terms: for a 12-cup auto-drip pot (12 x 6 fl oz = 72 fl oz = 9 US cups = 2,129 mL), use 2,129 / 16 = 133g of coffee (about 1 cup of coarsely ground beans by volume, or 19 tablespoons by level). NCA coffee brewing guidelines at NCAUSA.org. SCA standards at SCA.coffee.
Tip 3: Instant Pot and Pressure Cooker Minimum Liquid: Why 1 Cup Matters Exactly
The Instant Pot instruction manual requires a minimum of 1 cup (8 fl oz / 236.59 mL) of thin liquid to generate enough steam pressure to cook. Some models require 1.5 cups (354.88 mL). The exact mL value matters because if you follow a European recipe that calls for “250 mL broth” (1 metric cup), you might be below the required 236.59 mL minimum if you use a US measuring cup (you are actually over by 13 mL, so 250 mL is fine), but if a recipe calls for “200 mL” (less than 1 US cup = 236 mL), the Instant Pot may throw a “burn” error. The pressure cooker minimum is about generating steam, not flavoring the dish: the liquid volume needed is a device requirement, not a recipe requirement. For IP duo models: 1 cup minimum for up to 2-quart recipes. 6-quart models: 1 cup minimum. Check your specific model’s manual. USDA safe pressure canning at USDA.gov. FDA food safety at FDA.gov/food.
Tip 4: Japanese Recipes Use a 200 mL Cup, Not 236 mL or 250 mL
If you cook from Japanese recipe websites, cookbooks, or YouTube channels (Tasty Japan, Just One Cookbook, etc.), be aware that the Japanese kitchen cup (一合 for rice, or the standard measuring cup) is 200 mL, not 236.588 mL. This is especially important for rice: Japanese recipes calling for “2 cups of rice” mean 400 mL, but a US 2-cup measurement is 473 mL. Using a US measuring cup for Japanese rice dishes can result in over-watering. The Japanese rice ratio typically calls for “1.1-1.2x water to rice” in the same 200 mL cup: 200 mL rice needs 220-240 mL water. Using a US cup: 236.59 mL rice needs 260-284 mL water. The water ratio scales correctly as long as you use the same cup for both rice and water. Problems arise only when you switch cup standards between the rice and water measures. Japanese Industrial Standards (JIS) for kitchen measures at JISC.go.jp. USDA rice preparation guide at USDA.gov.
Tip 5: Why Professional Bakers Weigh Instead of Measuring in Cups (And When It Does Not Matter)
A US cup of all-purpose flour can weigh anywhere from 113g (if sifted and spooned into the cup) to 155g (if scooped directly from the bag). The “correct” value per King Arthur: 120g per cup (spooned and leveled). USDA FoodData Central: 125g. BobsRedMill: 136g. None of these are wrong; they reflect different scooping techniques. A 30% variance in cup-to-gram flour conversion means a recipe developer’s “2 cups flour” could mean anywhere from 226g to 310g depending on their technique. For cookies: this variance affects spread and texture but rarely ruins the batch. For French macarons, croissants, or sourdough bread: 30% more flour can be the difference between success and a dense brick. The USDA food composition database at FDC.nal.usda.gov lists all ingredient weights per cup. King Arthur flour-to-grams guide at KingArthurBaking.com. Baking tip: weigh by grams for anything requiring precision (yeast breads, croissants, pastry). Cup measures are fine for most cookies, muffins, quick breads, and sauces.
Quick Reference: Common US Cup Values Converted to mL
| US Cups | mL (exact) | fl oz | Equivalent |
|---|---|---|---|
| 1/8 cup | 29.588 mL | 1 fl oz | = 2 tbsp. Exactly 1 US fl oz. Small sauce or oil additions. |
| 1/4 cup | 59.147 mL | 2 fl oz | = 4 tbsp. Oil, honey, small liquid additions in baking. |
| 1/3 cup | 78.863 mL | 2.67 fl oz | = 5 tbsp + 1 tsp. Butter, milk, sugar in many baked goods. |
| 1/2 cup | 118.294 mL | 4 fl oz | = 8 tbsp. 1 stick US butter = 1/2 cup = 118.29 mL = 113g. |
| 3/4 cup | 177.441 mL | 6 fl oz | = 12 tbsp. Very common in baking for cream or juice. |
| 1 cup | 236.588 mL | 8 fl oz | = 16 tbsp = 48 tsp. US customary cup. 236.5882365 mL (exact). |
| 2 cups | 473.176 mL | 16 fl oz | = 1 US pint. Standard broth/stock carton = 4 cups (1 quart). |
| 4 cups | 946.353 mL | 32 fl oz | = 1 US quart. Instant Pot large recipe. Standard carton size. |
| 8 cups | 1,892.706 mL | 64 fl oz | = 1/2 US gallon. Large soup pot. Party punch base. |
| 16 cups | 3,785.412 mL | 128 fl oz | = 1 US gallon. Exactly 3,785.411784 mL. Large batch canning. |
| 1 cup (reference) | 236.5882365 mL | 8 fl oz | Exact: 8 x 29.5735295625 mL. Source: NIST.gov. US gallon / 128 / 8 = 236.5882365. |
Formula: mL = cups x 236.5882365 (US customary). Metric cup: mL = cups x 250. FDA legal cup: mL = cups x 240. Source: NIST.gov. SCA brewing ratios at SCA.coffee. USDA ingredient weights at FDC.nal.usda.gov.
Frequently Asked Questions: Cups to mL
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Legal Disclaimer and Editorial Transparency
The Cups to mL Converter on USCalculators.com is for educational and informational purposes only. Conversion formula: 1 US customary cup = 236.5882365 mL (exact: 8 US fl oz x 29.5735295625 mL per fl oz; 1 US fl oz = 1 US gallon / 128 = 3,785.411784 mL / 128). Source: NIST Handbook 44 at NIST.gov. 1 metric cup = 250 mL (Australia National Measurement Act, Canada, UK). 1 US FDA legal cup = 240 mL per 21 CFR 101.9 at eCFR.gov. Coffee brew ratios per SCA (Specialty Coffee Association) Brewing Standards at SCA.coffee and NCA at NCAUSA.org. Recipe scaling results are mathematical conversions only. Actual recipe outcomes depend on ingredient quality, technique, equipment calibration, altitude, and other variables. For precision baking, weighing ingredients in grams is recommended over volume measurements. USDA food composition data at FDC.nal.usda.gov. This tool does not constitute culinary, nutritional, or medical advice.