At One Place

Teaspoons to US cups

1 teaspoon in US cups
1 tsp = 0.020833 cup
cup = tsp × 1/48

To convert teaspoons to US cups, multiply by 0.02083333333. The table below gives the values people look up most often, and the converter works for any number.

Teaspoons to US cups table

Common teaspoon values converted to US cups.
Teaspoons US cups
1 tsp 0.020833
2 tsp 0.041667
3 tsp 0.0625
4 tsp 0.083333
5 tsp 0.10417
10 tsp 0.20833
15 tsp 0.3125
20 tsp 0.41667
25 tsp 0.52083
30 tsp 0.625
40 tsp 0.83333
50 tsp 1.041667
75 tsp 1.5625
100 tsp 2.083333
250 tsp 5.208333
500 tsp 10.41667
1,000 tsp 20.83333

How the conversion works

The relationship is cup = tsp × 1/48. Both units measure volume, so the conversion is a fixed factor that never changes. The figure is exact rather than approximate: since the international yard and pound agreement of 1959, an inch is defined as exactly 25.4 millimetres and a pound as exactly 0.45359237 kilograms, and every other imperial and US customary unit here is derived from those two.

US cup: US legal cup is 240 mL; the customary cup used here is 236.588 mL.

Common questions

How many US cups are in one teaspoon?
One teaspoon equals 0.020833 US cups. cup = tsp × 1/48.
How do you convert teaspoons to US cups?
Use cup = tsp × 1/48. So 10 tsp is 0.20833 cup.
How many teaspoons are in one US cup?
One US cup equals 48 teaspoons, which is the reverse of the conversion above.
Is there more than one kind of US cup?
US legal cup is 240 mL; the customary cup used here is 236.588 mL.

Related pages

Sources

  1. Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
  2. The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
  3. Calculated on this page — At One Place

How these figures are compiled and checked