Convert US cups to US teaspoons
1 US cup is 48 tsp. One US cup is exactly 48 US teaspoons.
One US cup is 48 US teaspoons. To convert US cups to US teaspoons, multiply by 48; to go the other way, divide by 48 or multiply by 0.020833333. The factor is exact rather than rounded: it follows from NIST Handbook 130. Eight US fluid ounces, about 236.6 ml.
Factor checked against the defining standard · How we check
- US cups × 48
1 * 4848 tsp
1 US cup in every volume unit
| Unit | Value | Exact factor |
|---|---|---|
| US teaspoons | 48 tsp | × 48 |
| US tablespoons | 16 tbsp | × 16 |
| US fluid ounces | 8 fl oz | × 8 |
| US cups (as entered) | 1 cup | — |
| US pints | 0.5 pt | × 0.5 |
| US quarts | 0.25 qt | × 0.25 |
| US gallons | 0.0625 gal | × 0.0625 |
| milliliters | 236.5882365 ml | × 236.5882365 |
| liters | 0.2365882365 L | × 0.2365882365 |
| imperial gallons | 0.05204213654 gal (UK) | × 0.0520421365393 |
| imperial quarts | 0.2081685462 qt (UK) | × 0.208168546157 |
| imperial pints | 0.4163370923 pt (UK) | × 0.416337092314 |
| imperial fluid ounces | 8.326741846 fl oz (UK) | × 8.32674184629 |
| imperial gills | 1.665348369 gi (UK) | × 1.66534836926 |
| cubic millimetres | 236,588.2365 mm³ | × 236,588.2365 |
| cubic centimetres | 236.5882365 cm³ | × 236.5882365 |
| cubic inches | 14.4375 in³ | × 14.4375 |
| cubic feet | 0.008355034722 ft³ | × 0.00835503472222 |
| cubic yards | 0.0003094457305 yd³ | × 0.000309445730453 |
| cubic metres | 0.0002365882365 m³ | × 0.0002365882365 |
Factors are entered by hand from NIST Handbook 130 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert US cups to US teaspoons? The converter and the working
- 1.Take the measurement in US cups.
- 2.Multiply by 48 — that is how many US teaspoons fit in one US cup.
- 3.To go back the other way, divide by 48, or multiply by 0.020833333.
Worked example: 25 US cups to US teaspoons
- Formula
- cup × 48 = tsp
- Arithmetic
- 25 × 48 = 1,200 tsp
- Answer
- 25 cup = 1,200 tsp
The factor is exact, so this figure is exact too — only the display is rounded.
US cups to US teaspoons conversion table
| US cups | US teaspoons |
|---|---|
| 1 cup | 48 tsp |
| 2 cup | 96 tsp |
| 3 cup | 144 tsp |
| 4 cup | 192 tsp |
| 5 cup | 240 tsp |
| 6 cup | 288 tsp |
| 7 cup | 336 tsp |
| 8 cup | 384 tsp |
| 9 cup | 432 tsp |
| 10 cup | 480 tsp |
| 12 cup | 576 tsp |
| 15 cup | 720 tsp |
| 20 cup | 960 tsp |
| 25 cup | 1,200 tsp |
| 50 cup | 2,400 tsp |
| 100 cup | 4,800 tsp |
| 200 cup | 9,600 tsp |
| 300 cup | 14,400 tsp |
| 500 cup | 24,000 tsp |
| 1000 cup | 48,000 tsp |
| 2000 cup | 96,000 tsp |
| 5000 cup | 240,000 tsp |
| 10000 cup | 480,000 tsp |
The teaspoon on a nutrition label is exactly 5 ml; the one in the drawer is not
The US customary teaspoon is 4.92892159375 ml and the US customary cup is 236.5882365 ml, so a cup is 48 teaspoons. Food labelling rounds both: 21 CFR sets the labelling teaspoon at 5 ml and the labelling cup at 240 ml. A metric cup, in Australia and New Zealand, is 250 ml, and a Japanese cup is 200 ml. For salt and leavening in a small batch the difference is enough to notice.
21 CFR 101.9(b)(5) — Nutrition labelling of food, household measures
What is a US cup?
Eight US fluid ounces, about 236.6 ml. The "legal" cup on nutrition labels is a rounded 240 ml.
What is a US teaspoon?
One third of a tablespoon, about 4.93 ml. A metric teaspoon is a round 5 ml, which is why recipes rarely notice the difference.
How many US teaspoons are in a US cup?
One US cup is 48 US teaspoons, exactly. Going the other way, one US teaspoon is 0.020833333 US cups. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every volume unit here
The whole group — 20 units with their symbols and the size of each one in liters — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to a US cup.
Cite this page
- APA
- Rule Calculator. (2026). Convert US cups to US teaspoons. Rule Calculator. https://rulecalculators.com/convert/cup-to-teaspoon
- MLA
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- Chicago
- Rule Calculator. "Convert US cups to US teaspoons." Rule Calculator. Last reviewed August 16, 2026. https://rulecalculators.com/convert/cup-to-teaspoon.
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Questions people actually ask
- How many US teaspoons are in a US cup?
- 48. One third of a tablespoon, about 4.93 ml. A metric teaspoon is a round 5 ml, which is why recipes rarely notice the difference.
- How do I convert US teaspoons back to US cups?
- Divide by 48, or multiply by 0.020833333 — they are the same operation.
Other volume conversions
US teaspoons to US cups — the same conversion the other way.