Teaspoon (water-equivalent) to Cup (water-equivalent)

Free instant teaspoon (water-equivalent) to cup (water-equivalent) converter. 1 tsp = 0.0208333 cup.

=⇄
0.0208333
Formula
1 tsp = 0.0208333 cup

Common Teaspoon (water-equivalent) to Cup (water-equivalent) values

Common Teaspoon (water-equivalent) to Cup (water-equivalent) conversion values.
Teaspoon (water-equivalent) (tsp)Cup (water-equivalent) (cup)
10.0208333
50.104167
100.208333
250.520833
501.04167
1002.08333
50010.4167
100020.8333

How does Teaspoon (water-equivalent) to Cup (water-equivalent) conversion work?

Type a value in the Teaspoon (water-equivalent) (tsp) field and the equivalent in Cup (water-equivalent) (cup) appears instantly to the right. The math uses the exact formula shown above — no rounding errors, no approximations beyond standard floating-point precision. Use the swap button to flip the units and see the inverse conversion.

Teaspoon (water-equivalent). 1 US teaspoon = 4.929 mL (1/6 fl oz). Equivalent grams assume water density.

Cup (water-equivalent). 1 US legal cup = 236.588 mL = 8 fl oz. Equivalent grams assume water density — use the ingredient-specific cup entry for flour, sugar, etc.

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🎯 Accurate conversions

Conversion factors come from the official standard (NIST, BIPM, ISO definitions where applicable). Values are precise to standard floating-point limits.

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Frequently asked

What is the formula for converting Teaspoon (water-equivalent) to Cup (water-equivalent)?+
The formula is: 1 tsp = 0.0208333 cup. Type any value into the calculator above and the result appears instantly.
How do I convert Cup (water-equivalent) back to Teaspoon (water-equivalent)?+
Click the swap button (⇄) above to go to the Cup (water-equivalent) → Teaspoon (water-equivalent) converter, or use the inverse formula derived from the one shown.
How accurate is the conversion?+
Conversion factors used here are exact rational values from NIST SP 811 and the BIPM SI brochure (e.g. 1 ft = 0.3048 m exactly, 1 lb = 0.45359237 kg exactly). Trailing-digit differences vs hand calculation come only from binary floating-point representation, never from the conversion factor itself.
Where do these conversion factors come from?+
Length and mass factors come from the 1959 international yard-and-pound agreement; SI base units (metre, kilogram, second, kelvin) come from the 2019 BIPM redefinition; energy and pressure factors are NIST SP 811 reference values. Each editorial section above lists the specific source for that category.
Can I copy the conversion factor for use elsewhere?+
Yes. The factor in the formula above is the exact rational value used internally; copying it into Excel or another tool reproduces the result to floating-point precision.

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