Tablespoons and milliliters
The US tablespoon is half a US fluid ounce: exactly 14.78676478125 milliliters, or 3 teaspoons. Recipes use tablespoons for oil, butter, sauces and spices. Australian tablespoons are 20 mL.
The milliliter is one thousandth of a liter, the same volume as one cubic centimeter. Medicine doses, cosmetics, small bottles and metric recipes are measured in milliliters.
Worked example
Convert 2 tbsp: 2 × 14.78676478 = 29.57352956, so 2 tablespoons is 29.57352956 milliliters. Likewise 5 tbsp = 73.93382391 mL.
Estimating in your head
Multiply by 15 for a quick figure; it is off by about 1.4%. For 2 tbsp that gives 30 mL, against 29.5735 exactly.
Going the other way
To convert milliliters to tablespoons, divide by 14.78676478 (or multiply by 0.0676280454037). The swap button between the boxes opens that page.
How this works
mL = tbsp × 14.78676478
1 tbsp = ≈ 0.00001478676478 m³ and 1 mL = 0.000001 m³, both by definition, so the factor is their ratio: 14.78676478 (rounded here; the page uses the full value). Results drop binary floating-point noise beyond 15 significant digits and display at the precision you choose (6 significant figures by default). Copy result copies the full value.
Frequently asked
How many milliliters are in a tablespoon?
1 tablespoon = 14.78676478 milliliters. The factor is exact by definition but has endless decimals, so it is shown rounded; the page uses the full value.
How do I convert tablespoons to milliliters?
Multiply by 14.78676478. For example, 5 tbsp × 14.78676478 = 73.93382391 mL.
What is 10 tbsp in milliliters?
10 tbsp = 147.8676478 mL. The table next to the converter lists more common values.
Is the result rounded?
Only on screen. The page computes with the exact definitions and removes floating-point noise past 15 significant digits; pick 3 to 12 significant figures, or use Copy result for the full value.
Sources
- NIST SP 811 Appendix B.8 — Factors for units listed alphabetically
- NIST Handbook 44 — Appendix C, General tables of units of measurement
- Wikipedia — United States customary units
Reviewed Oct 17, 2026 · test vectors fixtures/units/volume/tablespoons-to-ml/