21 fl oz to cup
21 US fluid ounces in US cups
21 fl oz = 2.625 cup
cup = fl oz × 1/8
21 US fluid ounces is 2.625 US cups. To get there, multiply by 0.125.
Values either side
| US fluid ounces | US cups |
|---|---|
| 17 fl oz | 2.125 |
| 18 fl oz | 2.25 |
| 19 fl oz | 2.375 |
| 20 fl oz | 2.5 |
| 21 fl oz ← | 2.625 |
| 22 fl oz | 2.75 |
| 23 fl oz | 2.875 |
| 24 fl oz | 3 |
| 25 fl oz | 3.125 |
How the conversion works
The relationship is cup = fl oz × 1/8. 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 fl oz in US cups?
- 21 fl oz is 2.625 cup.
- How do you convert US fluid ounces to US cups?
- Multiply by 0.125.
Related pages
- US fluid ounces to US cups Full table and converter
- 21 cup to fl oz The other direction
- 17 fl oz to cup 2.125 cup
- 18 fl oz to cup 2.25 cup
- 19 fl oz to cup 2.375 cup
- 20 fl oz to cup 2.5 cup
- 22 fl oz to cup 2.75 cup
- 23 fl oz to cup 2.875 cup
- 24 fl oz to cup 3 cup
- 25 fl oz to cup 3.125 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