What size growlers are common in the UK?

The most common sizes are 1 litre (often glass flip-top), 1.89 litres (US half-gallon, common imports), and 2 litres. Some craft beer shops use 946ml (32oz) or 750ml bottles. Glass flip-top growlers are the UK standard for homebrew sharing.

How long does beer last in a growler?

Unopened and refrigerated, a properly filled growler lasts 3-5 days. Once opened, drink within 24-36 hours as carbonation escapes and oxygen enters. Counter-pressure filled growlers (sealed under CO2 pressure) last 1-2 weeks unopened.

How do I fill a growler from a keg?

The simplest method is filling from the tap at low pressure (5-8 PSI). Tilt the growler and fill slowly down the side to minimise foaming. Better methods include a counter-pressure filler or a growler filling tube that reaches the bottom. Chill the growler first to reduce foaming.

Can I fill growlers for friends?

In the UK, you can share homebrew for free with friends and family for personal consumption. You cannot sell it without proper licensing. Growlers are a great way to share your homebrew at gatherings or give as gifts.

How long does a growler stay fresh?

An unopened growler filled with properly purged CO2 stays fresh for 5-7 days. Once opened, consume within 24-36 hours as CO2 escapes and oxidation begins. Counter-pressure filled growlers last longer than gravity-filled ones.

BrewCalcs

Growler Fill Calculator

Calculate growler fills from your keg and track remaining volume.

Keg Size

Current Level in Keg

Estimated beer remaining

Growler Size

How We Calculate This

Growler Count

Growlers Fillable = Current Keg Volume / Growler Size, rounded down (you cannot fill a partial growler properly). Remaining volume is what is left in the keg after filling. Pint counts use the UK pint of 568ml.

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Last updated: 2025-02-20

All calculations are estimates. Always verify values and adjust based on your equipment and ingredients.