1 Tablespoon to mL
Exactly how many milliliters are in 1 tablespoon? 1 US tablespoon = 14.7868 mL, with a quick reference table for other spoon measures.
1 Tablespoon to mL: The Quick Answer
1 tablespoon (1 tbsp) converts to 14.79 mL. Whether you are reading a metric label, a recipe, or an international spec, knowing how to convert 1 tablespoon (1 tbsp) keeps your numbers consistent. Use our tablespoons to ml converter for any value, or read on for the full breakdown of the 14.79 mL result.
The Exact Tablespoons to Milliliters Formula
A US tablespoon is defined from the fluid ounce: 1 US fluid ounce = 29.5735 mL and 1 tablespoon = 1/2 fluid ounce, so 1 tbsp = 14.7868 mL exactly. To convert any tablespoon amount to milliliters, multiply the tablespoons by 14.7868.
Step-by-Step Calculation
Start with 1 tbsp. Multiply by 14.7868: 1 x 14.7868 = 14.7868 mL, which rounds to 14.79 mL.
A Quick Mental Estimate
Since 1 tbsp is very close to 15 mL, you can round to 15 for rough kitchen measuring, which is off by only about 0.2 mL.
Where 1 tablespoon (1 tbsp) Comes Up
The tablespoon is a core US cooking measure, but nearly every metric recipe, nutrition label, and liquid-medicine dose lists milliliters. A single tablespoon of oil, vanilla, or cough syrup is 14.79 mL, so the figure lets you measure with a metric jug or oral syringe. It also appears in cocktail and coffee recipes that specify mL.
1 tablespoon (1 tbsp) Compared With Nearby Values
A few nearby spoon amounts put 1 tbsp in context: 0.5 tbsp = 7.39 mL, 2 tbsp = 29.57 mL.
On the other side, 3 tbsp = 44.36 mL, 4 tbsp = 59.15 mL. Each step moves the figure smoothly, so the same formula scales to any amount.
Practical Uses of the 1 tablespoon (1 tbsp) Conversion
Use the conversion when following a European or Australian recipe, reading a supplement label in mL, or dosing liquid medicine where precision matters. Our tablespoons to mL converter handles any amount, and teaspoons to mL covers the smaller spoon.
Frequently Asked Questions
How many mL is 1 tablespoon?
1 US tablespoon = 14.7868 mL (about 14.79 mL).
How many mL is half a tablespoon?
0.5 tbsp × 14.7868 = 7.3934 mL.
Is a tablespoon the same as a teaspoon?
No. 1 tbsp = 3 tsp = 14.7868 mL, while 1 tsp = 4.92892 mL.
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Quick Summary
1 tablespoon (1 tbsp) equals 14.79 mL. Use the tablespoons to milliliters relationship shown above for exact, repeatable results.
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Disclaimer
Unit conversions on this site use internationally recognized, fixed conversion factors (for example, 1 inch = 2.54 cm, 1 pound = 0.45359237 kg, 1 °F = (°C × 9/5) + 32). They are provided for general, informational, and educational use. For applications where accuracy is critical — such as medical dosing, engineering, scientific research, trade, or legal compliance — always verify results against authoritative sources such as the U.S. National Institute of Standards and Technology (NIST) and the official International System of Units (SI) brochure, and follow any applicable local standards.
Exact Constants & Authoritative Sources
Every conversion on this page uses the fixed, internationally agreed constants below — drawn from NIST and the SI Brochure. No values are estimated or rounded as if exact. See the full list on our Sources & Standards page.
- EXACT1 US gallon (gal) = 3.785411784 litres (exact, 231 in³)
- EXACT1 US fluid ounce (fl oz) = 29.5735295625 mL (exact, 1/128 gal)
- EXACT1 US cup = 236.5882365 mL (exact, 8 fl oz)
- EXACT1 US pint (pt) = 473.176473 mL (exact, 16 fl oz)
- EXACT1 US quart (qt) = 946.352946 mL (exact, 32 fl oz)
- EXACT1 litre (L) = 1000 millilitres (definition)
Common Pitfalls & How to Avoid Them
US vs. Imperial (UK) cups
A US cup is 236.59 mL, but a UK/metric cup is 250 mL and an Imperial cup is ~284 mL. Recipes from different countries are not interchangeable drop-in.
Fluid ounce is volume, not mass
A US fl oz is 29.57 mL of volume. 1 fl oz of water ≈ 29.57 g, but 1 fl oz of honey or oil weighs more. Do not treat fluid ounces as grams.
Teaspoon/tablespoon sizes differ
1 US tbsp = 14.7868 mL; 1 US tsp = 4.92892 mL. Metric measuring spoons are 15 mL and 5 mL — close but not exact; for baking precision use weighed grams.
A unit-conversion reference site has no manufacturer-specific or device calibration parameters, so "layered tuning" does not apply here. The only real error-handling is input validation: the converter rejects non-numeric, empty, or out-of-range entries and shows a clear message, then falls back to exact constants above. No estimated or rounded figures are ever presented as exact.
Authoritative sources for this page
- NIST (U.S. National Institute of Standards and Technology) — NIST SP 330 — The International System of Units (SI), 2019 edition
- BIPM (International Bureau of Weights and Measures) — SI Brochure — The International System of Units (9th edition)
Last Updated 2026 | This article was reviewed for accuracy