Keg Volume Calculator — Remaining Beer
Calculate how much beer remains in a keg from its weight or CO2 usage.
How We Calculate This
Weight Method
Remaining litres = (Current weight - Empty weight) / Beer density
Beer density is approximately 1.01 kg/L for most beers. Higher gravity beers may be 1.02-1.03 kg/L.
CO2 Method
Remaining litres = Keg capacity - (CO2 used g / CO2 per litre)
Approximately 2.5g of CO2 is used per litre dispensed at typical serving pressures.
Frequently Asked Questions
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Last updated: March 2026
All calculations are estimates. Always verify values and adjust based on your equipment and ingredients.