21 tsp to cup
21 teaspoons in US cups
21 tsp = 0.4375 cup
cup = tsp × 1/48
21 teaspoons is 0.4375 US cups. To get there, multiply by 0.02083333333.
Values either side
| Teaspoons | US cups |
|---|---|
| 17 tsp | 0.35417 |
| 18 tsp | 0.375 |
| 19 tsp | 0.39583 |
| 20 tsp | 0.41667 |
| 21 tsp ← | 0.4375 |
| 22 tsp | 0.45833 |
| 23 tsp | 0.47917 |
| 24 tsp | 0.5 |
| 25 tsp | 0.52083 |
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
- What is 21 tsp in US cups?
- 21 tsp is 0.4375 cup.
- How do you convert teaspoons to US cups?
- Multiply by 0.02083333333.
Related pages
- Teaspoons to US cups Full table and converter
- 21 cup to tsp The other direction
- 17 tsp to cup 0.35417 cup
- 18 tsp to cup 0.375 cup
- 19 tsp to cup 0.39583 cup
- 20 tsp to cup 0.41667 cup
- 22 tsp to cup 0.45833 cup
- 23 tsp to cup 0.47917 cup
- 24 tsp to cup 0.5 cup
- 25 tsp to cup 0.52083 cup
Sources
- Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
- Calculated on this page — At One Place