21 gal to cup
21 US gallons in US cups
21 gal = 336 cup
cup = gal × 16
21 US gallons is 336 US cups. To get there, multiply by 16.
Values either side
| US gallons | US cups |
|---|---|
| 17 gal | 272 |
| 18 gal | 288 |
| 19 gal | 304 |
| 20 gal | 320 |
| 21 gal ← | 336 |
| 22 gal | 352 |
| 23 gal | 368 |
| 24 gal | 384 |
| 25 gal | 400 |
How the conversion works
The relationship is cup = gal × 16. 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 gallon: US liquid gallon. The imperial gallon is about 20% larger.
US cup: US legal cup is 240 mL; the customary cup used here is 236.588 mL.
Common questions
- What is 21 gal in US cups?
- 21 gal is 336 cup.
- How do you convert US gallons to US cups?
- Multiply by 16.
Related pages
- US gallons to US cups Full table and converter
- 21 cup to gal The other direction
- 17 gal to cup 272 cup
- 18 gal to cup 288 cup
- 19 gal to cup 304 cup
- 20 gal to cup 320 cup
- 22 gal to cup 352 cup
- 23 gal to cup 368 cup
- 24 gal to cup 384 cup
- 25 gal to cup 400 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