How is UK Proof to ABV Per Mille calculated?

Both scales are normalized through ABV percent, then converted using a fixed ratio.

Is the mirror direction available?

Yes. Use the switch button or open the ABV Per Mille to UK Proof page.

Can I use decimal inputs?

Yes. Decimal strength values are supported for lab, labeling, and mixology use cases.

proof (UK) to permille

1 UK Proof = 5.715 ABV Per Mille · fixed factor via canonical reference constants · no offset

Direct Answer

1 UK Proof equals 5.715 ABV Per Mille

This conversion uses a fixed factor based on canonical reference constants.

For 0.25 UK Proof, the result equals 1.42875 ABV Per Mille.

Converter Calculator

UK Proof (proof (UK))

1 UK Proof (proof (UK)) =
5.715 ABV Per Mille (permille)

Explanation

Multiply by 5.715 because 1 proof (UK) corresponds to 0.5715% ABV and 1 permille corresponds to 0.1% ABV. 100 UK proof equals 57.15% ABV. Per mille here means parts per thousand of ABV by volume.

For UK Proof to ABV Per Mille, values are computed with a single fixed factor anchored to canonical reference constants.

Manual spot checks match the displayed values because calculator and table share the same conversion definitions.

Method & Reference (Verified)

Method basis: UK Proof to ABV Per Mille uses the page-specific conversion model shown in Direct Answer.
Applied factor: 1 UK Proof = 5.715 ABV Per Mille (as defined for this route).
Consistency rule: calculator output and table values use the same constants and rounding policy.

Common Conversion Values

UK Proof (proof (UK))	ABV Per Mille (permille)
0.25	1.42875
0.5	2.8575
1	5.715
5	28.575
12	68.58
20	114.3
40	228.6
57.15	326.61225
80	457.2
100	571.5