Alcohol Dilution
Calculator

Rigorous % v/v dilution for ethanol and isopropanol. Ethanol uses the OIML R22 Wagenbreth-Blanke polynomial (−20 °C to +40 °C). Isopropanol uses Perry's 6th Ed. % v/v tables extended to 40 °C. Volume contraction is implicitly handled via measured mixture densities.

01 — Alcohol type

Select alcohol

02 — Known quantity

Weight of concentrated alcohol (grams)

03 — Concentrated alcohol properties

Concentration of concentrated alcohol (% v/v, defined at the reference temperature below)

98.0%

Reference temperature — temperature at which the % v/v above is defined (°C)

04 — Target concentration & ambient temperature

Target concentration (% v/v, at reference temperature)

Ambient temperature — current temperature of alcohol and water (°C) Results reported at this temperature (0–40 °C)

Results

▶ Calculation trace

Version 1.0 — Last updated: 4 April 2026

Alcohol DilutionCalculator

Alcohol Dilution
Calculator