How Many Bottles in a Cask? Whisky Cask Calculator

Your cask

Cask type

Litres in the cask

Strength (% ABV)

Use the bulk litres and strength from your latest regauge if you have one. The example shown is a freshly filled hogshead at 63.5%.

Bottled at

Bottle size

Age of the whisky now (years)

A cask loses most in its first couple of years, then the rate slows. Giving the age means the heavier early-year losses aren’t applied again to an older cask.

Look ahead: 10 years

Loss assumptions

Volume lost in year one (%)

Volume lost each year from year three (%)

Strength lost each year (% ABV)

Lost at bottling (%)

Every cask and warehouse is different. The defaults follow figures commonly quoted for Scotland: around 4% of the volume in the first year, halfway between that and the later rate in year two, then about 2% a year, with strength falling by about 0.5% ABV a year. We allow 5% for whisky lost in the cask, filtering and filling at bottling. Set that to 0 to see the most the cask could give.

In 10 years, bottled at 46%

70cl bottles

Bottles today0

Pure alcohol in cask0

Bottles each yearYear you’ve chosenBelow 40%

Year	Litres	Strength	Cask strength	46%	40%

A note on reduction

These figures are an estimate. Every cask matures differently, and a fresh regauge is the most accurate figure you’ll get before bottling.