Teaspoons to Tablespoons
Convert teaspoons to tablespoons with the exact ratio (3 tsp = 1 tbsp), a quick reference table, and common cooking measurement examples.
tsp to tbsp formula
To convert teaspoons (tsp) to tablespoons (tbsp), divide by 3, because 1 tablespoon = 3 teaspoons exactly in US cooking.
Quick reference: tsp to tbsp
Common values
1 tsp = 0.333 tbsp
3 tsp = 1 tbsp
6 tsp = 2 tbsp
12 tsp = 4 tbsp
Worked example
Convert 3 tsp to tbsp:
3 tsp ÷ 3 = 1 tbsp
So 3 teaspoons equal 1 tablespoon.
Why convert tsp to tbsp?
US recipes may list spices in teaspoons while measuring spoons are marked in tablespoons. This conversion keeps your cooking accurate.
You can also use our calculator or read the paired guide tbsp reference.
Frequently Asked Questions
How many teaspoons are in a tablespoon?
1 tablespoon = 3 teaspoons (US).
How do I convert 6 tsp to tbsp?
6 tsp ÷ 3 = 2 tbsp.
Are metric and US teaspoons the same?
US and metric teaspoons are both 5 mL, so the 3:1 ratio holds for both.
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Quick Summary
tsp to tbsp uses a single exact factor. Use the formula above or the reference table for quick, accurate results.
Related Guide
Tbsp to Teaspoon: Convert Tablespoons to Teaspoons
Convert tbsp to teaspoon: one US tablespoon equals 3 teaspoons. Learn the exact ratio, the metric exception, and common spoon conversions.
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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