Keg Calculator

A half barrel holds 1984 oz, which is 124 pints at 16 oz or 165 twelve-ounce cups. A quarter barrel gives 62 pints, a sixth barrel holds 661 oz for 41 pints, and a corny keg holds 640 oz for 40 pints, all counting whole 16 oz pours.

The presets are a half barrel at 1984 oz (the full-size keg), a quarter barrel or pony keg at 992 oz, a sixth barrel or sixtel at 661 oz, and a corny keg at 640 oz, the roughly five-gallon vessel homebrewers use.

It divides the keg volume in ounces by your pour size and keeps only the whole number, using floor. A half barrel at 16 oz gives floor of 1984 over 16, which is exactly 124. A sixth barrel at 12 oz gives floor of 661 over 12, which is 55.

Enter the servings you expect in Servings needed. The tool divides that by servings per keg and rounds up. For 300 pints from half barrels that pour 124 each, 300 over 124 is about 2.42, which rounds up to 3 kegs.

Foam and head space mean a 16 oz glass usually holds about 14 to 15 oz of beer, so a keg can serve a few more glasses than the strict math. The tool counts whole pours at the exact size you enter and does not add a foam allowance.

No. It counts only whole pours, so any beer left over that is smaller than one full pour is not assumed to serve anyone. Kegs to buy is always rounded up so there is enough for the full headcount.

The pour size must be a positive number of fluid ounces, and it can be any value, including decimals. There is no metric input, but you can convert: a 500 ml pour is about 16.9 oz, and a 330 ml can is about 11.2 oz.

If the pour size is larger than the keg volume, a keg yields no complete serving and the tool shows an error instead of a plan. Keep the pour smaller than the keg, which any realistic glass size easily satisfies.

Yes. The calculator runs entirely in your browser and nothing you enter is uploaded to a server. Your keg choice, pour size and headcount stay on your device.