US Gallons to Forties Converter
Convert US gallons (gal) to forties (40 fl oz) (forty), with the formula, a conversion table and exact factors.
Change the values and press Calculate to work out your own figures.
Enter an amount of beer, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.
Show the working
- 1 gal = 3.2 forty
- 1 × 3.2 = 3.2 forty
How to convert us gallons to forties
1 gal = 3.2 forty, so multiply by 3.2 to go from US gallons to forties (40 fl oz). Going the other way, 1 forty = 0.3125 gal.
forty = gal × 3.2 gal = forty × 0.3125
Worked example:
1 gal = 3.2 forty 5 × 3.2 = 16 forty
US Gallons to forties table
| US Gallons | Forties |
|---|---|
| 1 gal | 3.2 forty |
| 2 gal | 6.4 forty |
| 3 gal | 9.6 forty |
| 4 gal | 12.8 forty |
| 5 gal | 16 forty |
| 6 gal | 19.2 forty |
| 7 gal | 22.4 forty |
| 8 gal | 25.6 forty |
| 9 gal | 28.8 forty |
| 10 gal | 32 forty |
| 15 gal | 48 forty |
| 20 gal | 64 forty |
| 25 gal | 80 forty |
| 30 gal | 96 forty |
| 40 gal | 128 forty |
| 50 gal | 160 forty |
| 75 gal | 240 forty |
| 100 gal | 320 forty |
| 250 gal | 800 forty |
| 500 gal | 1,600 forty |
| 1000 gal | 3,200 forty |
About the units
- US Gallons (gal)
- US gallons, a US customary unit. Definition: NIST Handbook 44 Appendix C (US customary units; US gallon = 231 in³).
- Forties (forty)
- Forties (40 fl oz), a US customary unit. Definition: Common US beer package sizes: 12 fl oz can or bottle, 22 fl oz bomber, 40 fl oz 'forty', 64 fl oz growler; kegs as fractions of the 31-gallon barrel.
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