20 gal ≈ 320 cup (Imperial; in US cups: 20 gal = 384.304 US cup). To convert gallons to cups, multiply by 16.000001: 20 × 16.000001 = 320.
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: 20 × 16.000001 = 320.
- Answer: 20 gal ≈ 320 cup (rounded to 6 significant figures).
Gallons to Cups table
| Gallons (gal) | Cups (cup) |
|---|---|
| 15 gal | 240 cup |
| 16 gal | 256 cup |
| 17 gal | 272 cup |
| 18 gal | 288 cup |
| 19 gal | 304 cup |
| 20 gal | 320 cup |
| 21 gal | 336 cup |
| 22 gal | 352 cup |
| 23 gal | 368 cup |
| 24 gal | 384 cup |
| 25 gal | 400 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: 20 US gal = 266.456 cup.
The cup here is the Imperial (UK) cup: 1 cup = 0.28413 L. A US cup is 0.236588 L.
In US cups: 20 gal = 384.304 US cup.