640 gal ≈ 10,240 cup (Imperial; in US cups: 640 gal = 12,297.7 US cup). To convert gallons to cups, multiply by 16.000001: 640 × 16.000001 = 10,240.
How to convert gallons to cups
cup = gal × 16.000001
- 1 gal = 16.000001 cup (and 1 cup = 0.062499995 gal).
- Multiply the amount by the factor: 640 × 16.000001 = 10,240.
- Answer: 640 gal ≈ 10,240 cup (rounded to 6 significant figures).
Gallons to Cups table
| Gallons (gal) | Cups (cup) |
|---|---|
| 635 gal | 10,160 cup |
| 636 gal | 10,176 cup |
| 637 gal | 10,192 cup |
| 638 gal | 10,208 cup |
| 639 gal | 10,224 cup |
| 640 gal | 10,240 cup |
| 641 gal | 10,256 cup |
| 642 gal | 10,272 cup |
| 643 gal | 10,288 cup |
| 644 gal | 10,304 cup |
| 645 gal | 10,320 cup |
| gal | cup |
|---|---|
| 1 gal | 16 cup |
| 5 gal | 80 cup |
| 10 gal | 160 cup |
| 50 gal | 800 cup |
| 100 gal | 1,600 cup |
| 1,000 gal | 16,000 cup |
Good to know
The gal here is the Imperial (UK) gallon: 1 gal = 4.54609 L. A US gallon is 3.78541 L.
In US gallons: 640 US gal = 8,526.59 cup.
The cup here is the Imperial (UK) cup: 1 cup = 0.28413 L. A US cup is 0.236588 L.
In US cups: 640 gal = 12,297.7 US cup.