The Stillbench blog

Better answers.
Better batch notes.

Spirit dilution explained with clear formulas, worked examples and the measurement details that matter at the bench.

Dilution essentials

How much water do I add to my spirit?

Estimate water additions from spirit volume, starting ABV and target ABV, with a dilution formula and a practical reference table.

Worked batch

Calculate the estimated water needed to dilute 83 litres at 65% ABV to 40%, then carry the result into bottle-yield planning.

Small-volume dilution

Estimate water for a whisky pour using starting and target ABV, including 30 mL and 50 mL worked examples.

Measurement & accuracy

Understand alcohol–water contraction, measurement temperature and other reasons a proofed batch can differ from its calculated ABV.