40 gal ≈ 640 cup (Imperial; in US cups: 40 gal = 768.608 US cup). To convert gallons to cups, multiply by 16.000001: 40 × 16.000001 = 640.
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: 40 × 16.000001 = 640.
- Answer: 40 gal ≈ 640 cup (rounded to 6 significant figures).
Gallons to Cups table
| Gallons (gal) | Cups (cup) |
|---|---|
| 35 gal | 560 cup |
| 36 gal | 576 cup |
| 37 gal | 592 cup |
| 38 gal | 608 cup |
| 39 gal | 624 cup |
| 40 gal | 640 cup |
| 41 gal | 656 cup |
| 42 gal | 672 cup |
| 43 gal | 688 cup |
| 44 gal | 704 cup |
| 45 gal | 720 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: 40 US gal = 532.912 cup.
The cup here is the Imperial (UK) cup: 1 cup = 0.28413 L. A US cup is 0.236588 L.
In US cups: 40 gal = 768.608 US cup.