Brewing tool

Dilution / Boil-Off Calculator

See how gravity changes when you top up with water or boil the wort down.

Guide

This uses gravity points and assumes the sugar stays in the wort while the volume changes.

Calculator

Enter your values

Starting volume

Volume unit

Starting gravity

Target mode

Target volume

Use this when the final volume is your target.

Target gravity

Use this when the gravity is your target.

Clear

Method

This uses gravity points and volume. The sugar stays the same; only the volume changes when you add water or boil wort down.

gravity points × volume = total points

Safety and limits

Real brews have losses, evaporation changes, and measurement quirks. Re-check your gravity before making the final call.

Use accurate measurements for the best estimate.