CanadaTier 1
ABV to proof calculator
Proof is exactly twice ABV on the scale still used on some Canadian spirits labels. Enter either value — the other updates live.
Free·No sign-up·Last checked 2026-08-27
Formula
Proof = ABV × 2ABV = Proof ÷ 2Worked example. 40% ABV × 2 = 80 proof. 100 proof ÷ 2 = 50% ABV.
Questions
No. Canada used the Imperial proof scale (about 1.75× ABV) until it switched to ABV labelling in 1980. This calculator uses the North American scale still seen informally on some spirits labels, where proof is exactly twice ABV — the same convention used in the US.
ABV is the figure required on Canadian labels and the internationally standard measure. Proof is a historical, mostly North American convention still printed alongside ABV on some spirits.