Tablespoons to mL Converter: Australian 20 mL Tablespoon Warning, Cocktail Jigger Math, OTC Medicine Dosing, and US vs Metric vs AU vs UK Tablespoon Standards
1 US tablespoon = 14.78676478125 mL exactly (3 US tsp = 1/2 fl oz). Australian tablespoon = 20 mL (35% more than US). OTC medicine label “1 tablespoon” = 15 mL (FDA rounds). Cocktail: 2 US tbsp = 1 fl oz jigger. Barspoon = 5 mL = 1 teaspoon (not 1 tablespoon). Three modes: single, App Decoder (cocktail, medicine, coffee, international standards), batch. 16 presets. Free PDF. WhatsApp share.
Tablespoons to mL
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Formula and Reference
The Australian Tablespoon Problem That Ruins Baking: Why 20 mL Is Not 14.787 mL and How a Dallas Baker Lost Her Cake to a Sydney Blog
The single most common international tablespoon confusion in American kitchens comes from Australian food blogs, cookbooks, and recipe websites. Australian tablespoons hold 20 mL, which is four Australian teaspoons (each 5 mL). A US tablespoon holds 14.78676478125 mL, which is three US teaspoons (each 4.929 mL). The difference: 5.213 mL per tablespoon, or 35.3% more volume in the Australian standard. This means if you follow a recipe from taste.com.au, Donna Hay, Bill Granger, or any other Australian food source and use standard US measuring spoons, you are using 26.1% less of every tablespoon-measured ingredient than the recipe intends.
For savory dishes where a tablespoon of olive oil, soy sauce, or fish sauce is just one of many balancing ingredients, the difference is usually unnoticeable. For baking, where a tablespoon of baking powder or baking soda determines whether your cake rises, whether your cookies spread, and whether your bread has the right crumb, the 35% gap can mean the difference between a perfectly risen sponge and a dense, flat failure. The fix is simple once you know: for every Australian tablespoon in a recipe, use 1 US tablespoon + 1 US teaspoon (14.787 + 4.929 = 19.716 mL, within 284 µL of the 20 mL Australian standard). This is accurate enough for all culinary applications. USDA food safety at FoodSafety.gov. NIST units at NIST.gov.
How This Three-Mode Tablespoon to mL Converter Works for Bakers, Bartenders, and Parents Measuring Medicine
Mode 1: Single Tablespoons to mL
Enter any US tablespoon value. Output: mL (to 3 decimal places), US teaspoons, fl oz, and US cups. A cross-reference shows all four tablespoon standards (US 14.787 mL, Metric EU 15 mL, Australian 20 mL, UK traditional 17.758 mL) for the same number of tablespoons. 16 presets from 0.25 tablespoons to 64 tablespoons (1 US quart). Bar chart compares your input to reference sizes (1 tbsp, 2 tbsp / 1 fl oz, 4 tbsp / 1/4 cup, 16 tbsp / 1 cup).
Mode 2: App Decoder
Select an application: Cocktail and Bartending (barspoon, jigger sizes, cocktail ounce measures), OTC Medicine and FDA Dosing (FDA 15 mL vs US 14.787 mL, pediatric and adult dose sizes), Coffee Brewing (SCA Golden Cup ratio, pour-over bloom, single mug proportions), or International Tablespoon Standards (US vs Metric vs Australian vs UK traditional, with the correction factor for Australian recipes). Enter your tablespoon value and see it highlighted against a reference table for that application. The bar chart scales all reference sizes in the category.
Mode 3: Batch Tablespoons to mL
Enter up to 20 tablespoon values, one per line. Output: a table with mL, teaspoons, fl oz, and US cups for each. Useful for a recipe developer converting an entire ingredient list from tablespoon volumes to mL for a metric baking guide, or a bartender creating a scaled-up batch cocktail recipe.
Complete Tablespoon to mL Reference: US Kitchen Fractions, Cocktail Measures, and International Standards
| US Tablespoons | US mL | fl oz | US Cups | Common Reference |
|---|---|---|---|---|
| 0.25 tbsp | 3.697 mL | 0.125 fl oz | 0.016 cups | 3/4 tsp. Fine baking add. No standard spoon; use 3/4 tsp measure. |
| 0.5 tbsp | 7.393 mL | 0.25 fl oz | 0.031 cups | 1.5 tsp. Half-tablespoon. No standard US spoon; use 1.5 tsp measure. |
| 1 tbsp | 14.787 mL | 0.5 fl oz | 0.063 cups | 1 US tablespoon = 3 US tsp = 1/2 fl oz = 14.787 mL. Metric = 15 mL. AU = 20 mL. UK = 17.758 mL. |
| 1.5 tbsp | 22.180 mL | 0.75 fl oz | 0.094 cups | 4.5 tsp. Cocktail: 3/4 fl oz liqueur. No standard spoon; use 1 tbsp + 1.5 tsp. |
| 2 tbsp | 29.574 mL | 1 fl oz | 0.125 cups | 1 fl oz. Standard jigger (short side). “1 oz” in any cocktail recipe = 2 US tablespoons = 29.574 mL. |
| 3 tbsp | 44.361 mL | 1.5 fl oz | 0.188 cups | 1.5 fl oz. Jigger long side. Double shot. Classic Margarita tequila. 9 US teaspoons. |
| 4 tbsp | 59.147 mL | 2 fl oz | 0.250 cups | 1/4 US cup = 4 tbsp. US butter: 1/4 cup = 4 tbsp = 1/2 stick = ~57g. |
| 6 tbsp | 88.721 mL | 3 fl oz | 0.375 cups | 3/8 cup = 6 tbsp. No standard cup mark. Use 1/4 cup + 2 tbsp. |
| 8 tbsp | 118.294 mL | 4 fl oz | 0.500 cups | 1/2 US cup. 1 US butter stick = 8 tbsp = 1/2 cup = ~113g = 118.29 mL. |
| 10 tbsp | 147.868 mL | 5 fl oz | 0.625 cups | 10 tbsp + 2 tsp = 2/3 cup. |
| 12 tbsp | 177.441 mL | 6 fl oz | 0.750 cups | 3/4 US cup = 12 tbsp. Common recipe fraction for flour, sugar, butter. |
| 16 tbsp | 236.588 mL | 8 fl oz | 1.000 cups | 1 US cup = 16 tbsp. Exact. Single coffee mug brew. US standard recipe unit. |
| 32 tbsp | 473.176 mL | 16 fl oz | 2.000 cups | 1 US pint. 32 tbsp = 2 cups = 0.5 qt. |
| 64 tbsp | 946.353 mL | 32 fl oz | 4.000 cups | 1 US quart = 64 tbsp = 32 fl oz = 4 cups = 2 pints. |
Exact: 1 US tbsp = 14.78676478125 mL. Source: NIST.gov NIST Handbook 44. AU tablespoon: Standards Australia AS 1376. OTC medicine: FDA.gov. SCA coffee standards: SCA.coffee.
International Tablespoon Standards: The Number That Changes Every Recipe
| Standard | mL per Tablespoon | Teaspoons | vs US (14.787 mL) | Used By |
|---|---|---|---|---|
| US tablespoon | 14.787 mL | 3 US tsp | Baseline | AllRecipes, NYT Cooking, King Arthur, USDA, FDA, most US recipe sites. |
| Metric tablespoon | 15.000 mL | 3 metric tsp (5 mL each) | +1.4% (213 µL more) | Modern UK, EU, Canada, Scandinavia. Usually interchangeable with US in cooking. |
| Australian tablespoon | 20.000 mL | 4 AU tsp (5 mL each) | +35.3% (5.213 mL more) | Australia: taste.com.au, Donna Hay, Bill Granger, Stephanie Alexander. Critical gap. |
| UK traditional | 17.758 mL | 3 UK tsp | +20.0% (2.971 mL more) | Pre-1970 British cookbooks. Modern UK uses 15 mL metric standard. |
AU tablespoon = 20 mL (4 x 5 mL teaspoons) per Standards Australia. UK traditional = 5/8 UK fl oz = 17.7581640625 mL. UK legislation: legislation.gov.uk. US: NIST Handbook 44 at NIST.gov.
Three Real US Examples: A Dallas Baker Following an Australian Blog, a Seattle Bartender Building a Margarita, and a Boston Parent Measuring Children’s Medicine
Example 1: A Dallas Baker Follows an Australian Brownie Recipe and Gets a Dense, Flat Result Because of the 20 mL Tablespoon Gap
Australian recipe: 3 tablespoons (AU) cocoa powder, 2 tablespoons (AU) baking powder. Actual AU amounts: 60 mL cocoa, 40 mL baking powder. Dallas baker uses US tablespoons: 3 US tbsp cocoa = 44.361 mL (26.1% short). 2 US tbsp baking powder = 29.574 mL (26.1% short). Result: dense, under-risen brownies.
Dallas pastry school student Emma found a highly rated Australian-style fudge brownie recipe on taste.com.au. The recipe calls for “3 tablespoons of Dutch cocoa powder” and “2 tablespoons of baking powder.” Emma measures with her US tablespoon set (14.787 mL each).
The calculation: 3 AU tablespoons of cocoa = 3 x 20 mL = 60 mL. Emma’s 3 US tablespoons = 3 x 14.787 = 44.361 mL. She is using 15.639 mL less cocoa than intended, about 26.1% short. 2 AU tablespoons of baking powder = 40 mL. Emma’s 2 US tablespoons = 29.574 mL. Short by 10.426 mL (34.8%). Under-leavened baked goods: denser, less fluffy texture, less rise. The fix for the cocoa: 3 US tablespoons + 3 US teaspoons (= 44.361 + 14.787 = 59.148 mL, within 852 µL of 60 mL AU). The fix for baking powder: 2 US tablespoons + 2 US teaspoons (= 29.574 + 9.858 = 39.432 mL, within 568 µL of 40 mL AU). General rule: every Australian tablespoon = 1 US tablespoon + 1 US teaspoon. USDA food safety at FoodSafety.gov.
Example 2: A Seattle Mixologist Converting a Classic Margarita Recipe from Ounces to Tablespoons for a Home Bar Workshop
Classic Margarita: 1.5 oz silver tequila (3 US tbsp = 44.361 mL) + 1 oz Cointreau (2 US tbsp = 29.574 mL) + 0.75 oz fresh lime juice (1.5 US tbsp = 22.180 mL). Total: 4.25 oz = 8.5 US tbsp = 125.736 mL. Shake over ice. Double strain into salt-rimmed glass.
Seattle cocktail instructor and James Beard-nominated beverage consultant Jake teaches a home bar workshop. Many home bartenders do not own a jigger. He needs to translate his Margarita recipe from fl oz to tablespoons for easy home measurement.
Translation: 1.5 fl oz tequila = 3 US tablespoons (1 fl oz = 2 US tbsp; 1.5 oz = 3 tbsp). 1 fl oz Cointreau = 2 US tablespoons = 29.574 mL. 0.75 fl oz lime juice = 1.5 US tablespoons = 22.180 mL. Total cocktail volume: 4.25 fl oz = 8.5 US tablespoons = 125.736 mL. Important notes for home bartenders: (1) A barspoon = 5 mL = 1 US teaspoon. Do NOT use a tablespoon when a recipe says “barspoon.” (2) A kitchen tablespoon can work in place of a jigger (2 tablespoons = 1 oz) for basic home cocktails, but jigger precision is better for Sour ratios. (3) The salt rim: 1 tablespoon of flaky sea salt on a plate covers enough rim area for 2-3 glasses. TTB spirits regulations at TTB.gov. USDA beverage data at FDC.nal.usda.gov.
Example 3: A Boston Parent Measuring Children’s Ibuprofen and the Difference Between FDA “1 Tablespoon” and a Kitchen Tablespoon
Children’s ibuprofen label: “For 48-59 lb child: 1 tablespoon (15 mL).” FDA “1 tablespoon” = 15 mL. US kitchen tablespoon = 14.787 mL. Gap = 213 µL = 1.4% underdose. Clinically negligible, but always use the provided dosing cup, not a kitchen tablespoon.
Boston elementary school teacher and parent Chris has a child with a fever. The children’s ibuprofen bottle says “for children 48-59 lbs: give 1 tablespoon (15 mL).” Chris reaches for a kitchen tablespoon, measures a level tablespoon, and wonders if this is correct.
The FDA defines “1 tablespoon” on OTC liquid medicine labels as exactly 15 mL. A US kitchen tablespoon = 14.78676478125 mL. Gap = 15 – 14.787 = 0.213 mL (213 µL). At 1.4% underdose, this is clinically negligible for ibuprofen: a 50-lb child’s proper dose of children’s ibuprofen is 7.5 mg/kg, and 213 µL of ibuprofen suspension (containing 100 mg/5 mL) = 0.004 mg of ibuprofen, far below any dosing threshold. However: (1) Kitchen spoon shape varies significantly; a heaping or angled tablespoon can vary by 10-25% in actual fill volume. (2) The FDA provides measuring cups in all OTC liquid medicines precisely because kitchen spoons are unreliable. (3) For any pediatric medicine: always use the measuring cup, dropper, or syringe provided with the product. Never estimate. FDA medication safety at FDA.gov/consumers. CDC child health at CDC.gov/children. AAP medication guidance at HealthyChildren.org.
Five Expert Tips: The Australian Fix, Cocktail Jigger Tablespoon Math, FDA Medicine Dosing, SCA Coffee Ratios, and Why 1 Tablespoon of Salt Weighs Different Every Time
Tip 1: The Australian Tablespoon Fix for US Kitchens
When following an Australian recipe with US measuring spoons, replace each Australian tablespoon with 1 US tablespoon + 1 US teaspoon (14.787 + 4.929 = 19.716 mL, 284 µL under the 20 mL AU standard, 1.4% error). Applied: AU “3 tablespoons butter” = 3 x (1 US tbsp + 1 US tsp) = 3 tbsp + 3 tsp = 59.148 mL (vs AU 60 mL). AU “2 tablespoons baking powder” = 2 US tbsp + 2 US tsp = 39.432 mL (vs AU 40 mL). The most critical ingredients to correct: baking powder, baking soda, salt, and spices measured in tablespoons. For these leaveners and flavor agents, the 35% gap between AU and US tablespoons is large enough to noticeably affect the final baked good. For oil, water, or liquid additions measured in tablespoons: the gap is less critical in most savory recipes. USDA food data at FDC.nal.usda.gov. FDA food labeling at FDA.gov/food.
Tip 2: Bartending With Tablespoons: Jigger Sizes in Tablespoons and Why a Barspoon Is Not a Tablespoon
For home bartenders without a jigger: 2 US tablespoons = 1 fl oz = 29.574 mL = standard jigger short side. 3 US tablespoons = 1.5 fl oz = 44.361 mL = standard jigger long side. 1.5 US tablespoons = 0.75 fl oz = 22.180 mL (common for triple sec or dry vermouth in Martini). A barspoon is NOT a tablespoon: 1 barspoon = 5 mL = 1 US teaspoon = 1/3 US tablespoon. Barspoons are used for stirring, for adding dashes of bitters, and for floating spirits on top of cocktails. If a cocktail recipe says “1 barspoon of orange liqueur,” it means 5 mL, not 14.787 mL. Using a tablespoon instead of a barspoon in a Negroni stir or a layered shooter will dramatically unbalance the cocktail. TTB spirits regulations at TTB.gov. NIAAA standard drinks at NIAAA.nih.gov.
Tip 3: FDA OTC Medicine Dosing: Why “1 Tablespoon on the Label” Is 15 mL, Not 14.787 mL
The US Food and Drug Administration standardized OTC liquid medicine dosing cups to use round milliliter values for clarity and safety: 5 mL for “1 teaspoon,” 10 mL for “2 teaspoons,” 15 mL for “1 tablespoon,” 30 mL for “2 tablespoons.” These FDA values are rounded from the actual US tablespoon (14.787 mL) and teaspoon (4.929 mL). For any FDA-regulated OTC medication: (1) Always use the measuring cup, oral syringe, or dosing spoon included with the product. (2) Never use a kitchen tablespoon or household teaspoon; kitchen spoon shapes vary widely in actual fill volume by 10-25%. (3) For pediatric dosing in particular, the correct measuring device is critical. (4) 1 US tablespoon of kitchen ware = 14.787 mL, while 1 FDA tablespoon dose = 15 mL; the 213 µL difference is clinically negligible but the kitchen spoon’s shape variability is not. FDA drug dosing at FDA.gov/consumers. AAP pediatric dosing at HealthyChildren.org. CDC medication safety at CDC.gov.
Tip 4: Coffee Brewing With Tablespoons: The SCA Golden Cup Standard and Real Home Brew Ratios
The SCA (Specialty Coffee Association) Golden Cup Standard recommends 55g of ground coffee per 1 liter (1,000 mL) of water. In tablespoons: 1 US tablespoon of medium-ground coffee weighs about 5-7g (varies by grind size and density). So 55g / 6g per tablespoon = about 9 tablespoons per 1 liter, or about 1.6 tablespoons per 6 fl oz (177 mL) of water. The common US home guide of “2 tablespoons per 6 oz” sits at the strong end of the SCA range: 2 x 6g = 12g per 177 mL = 67.8g per liter (above the SCA 55g/L minimum but within the 1:15-1:18 weight ratio range). For a single 8-fl oz (236.6 mL) mug: SCA optimal = 13g coffee = about 2-2.5 US tablespoons. For a 12-cup drip pot (72 fl oz = 2,130 mL): SCA = 117g = about 17-23 US tablespoons depending on grind density. SCA standards at SCA.coffee. USDA food data at FDC.nal.usda.gov.
Tip 5: Why 1 Tablespoon of Salt Weighs Differently Every Time and What It Means for US Recipes
1 US tablespoon = 14.787 mL by volume, always. But the weight of 1 tablespoon of salt varies dramatically by type: Table salt (fine): 1 tbsp = about 17-18g. Morton kosher salt (coarse flake): 1 tbsp = about 14-15g. Diamond Crystal kosher salt (fine flake): 1 tbsp = about 7-8g. Maldon sea salt (flaky crystal): 1 tbsp = about 5-6g. This means a recipe that says “1 tablespoon of kosher salt” using Morton yields about twice the sodium as the same tablespoon using Diamond Crystal. Professional bakers and serious home cooks always weigh salt in grams rather than measure by tablespoons. The rule: use tablespoon measures for water, oil, vinegar, and other liquids where density is consistent. Use gram weights for salt, flour, sugar, and other ingredients where crystal size and packing density vary significantly. USDA nutrition data at FDC.nal.usda.gov. FDA food labeling at FDA.gov/food. NIST weights at NIST.gov.
Quick Reference: Common US Tablespoon Values Converted to mL
| US Tablespoons | mL | fl oz | US Cups | Reference | Source |
|---|---|---|---|---|---|
| 0.5 tbsp | 7.393 mL | 0.25 fl oz | 1/32 cup | 1.5 tsp. Half-tablespoon. Use 1.5 tsp spoon. | NIST.gov. |
| 1 tbsp | 14.787 mL | 0.5 fl oz | 1/16 cup | 3 US tsp. Metric = 15 mL. AU = 20 mL. OTC label = 15 mL. | NIST Handbook 44. NIST.gov. |
| 2 tbsp | 29.574 mL | 1.0 fl oz | 1/8 cup | 1 fl oz = standard cocktail jigger. “1 oz” in any cocktail = 2 tbsp. | NIST.gov. TTB.gov. |
| 3 tbsp | 44.361 mL | 1.5 fl oz | 3/16 cup | 1.5 fl oz = double shot = jigger long side. Margarita tequila standard measure. | NIST.gov. TTB.gov. |
| 4 tbsp | 59.147 mL | 2.0 fl oz | 1/4 cup | 1/4 US cup. 1/2 US butter stick = 4 tbsp = ~57g. | NIST.gov. USDA. |
| 8 tbsp | 118.294 mL | 4.0 fl oz | 1/2 cup | 1/2 cup. 1 full US butter stick = 8 tbsp = ~113g = 118.29 mL. | NIST.gov. USDA. |
| 12 tbsp | 177.441 mL | 6.0 fl oz | 3/4 cup | 3/4 cup. Common recipe fraction for flour, sugar, and liquids. | NIST.gov. |
| 16 tbsp | 236.588 mL | 8.0 fl oz | 1 cup | 1 US cup = 16 tbsp exactly. Single coffee mug volume. | NIST.gov. 1 cup = 236.5882365 mL exact. |
| 32 tbsp | 473.176 mL | 16 fl oz | 2 cups | 1 US pint = 32 tbsp = 2 cups. | NIST.gov. |
| 64 tbsp | 946.353 mL | 32 fl oz | 4 cups | 1 US quart = 64 tbsp = 32 fl oz = 4 cups. | NIST.gov. |
| 1 tbsp (ref) | 14.78676478125 mL | 0.5 fl oz exact | 1/16 cup | Exact: 1/2 x 29.5735295625 mL/US fl oz. US gal (3785.411784 mL)/256. | NIST Handbook 44, NIST.gov. |
1 US tbsp = 14.78676478125 mL (exact). Source: NIST.gov. AU tablespoon = 20 mL: standards.org.au. OTC medicine dosing: FDA.gov. SCA coffee standard: SCA.coffee. Cocktail spirits: TTB.gov.
Frequently Asked Questions: Tablespoons to mL
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Legal Disclaimer and Editorial Transparency
The Tablespoons to mL Converter on USCalculators.com is for educational and informational purposes only. Exact: 1 US tablespoon = 14.78676478125 mL (1/2 US fl oz = 1/2 x 29.5735295625 mL/fl oz; or 1 US cup = 236.5882365 mL / 16 = 14.786764781… mL). Source: NIST Handbook 44 at NIST.gov. Australian tablespoon = 20 mL (4 x 5 mL teaspoons) per Standards Australia. UK traditional tablespoon = 5/8 UK fl oz = 17.7581640625 mL. Metric tablespoon = 15 mL (exact). OTC medicine dosing: the FDA defines “1 tablespoon” on over-the-counter medicine labels as 15 mL and “1 teaspoon” as 5 mL. For any liquid medication, always use the measuring cup, oral syringe, or dosing spoon included with the product. Never substitute a kitchen tablespoon for a medicine dosing device. Kitchen spoons vary in shape and actual fill volume. FDA drug safety at FDA.gov/consumers. CDC medication safety at CDC.gov. AAP pediatric dosing at HealthyChildren.org. Cocktail and bartending measures: 1 fl oz = 2 US tablespoons = 29.574 mL per NIST. TTB spirits regulations at TTB.gov. NIAAA alcohol guidelines at NIAAA.nih.gov. Coffee SCA Golden Cup Standard at SCA.coffee. USDA food data at FDC.nal.usda.gov. Recipe conversion information is provided for general informational purposes. For food safety and medical dosing, consult official guidelines and healthcare providers.