Volume Converter (gallons, litres, pints)
Convert litres, ml, UK and US gallons/pints — key: UK and US gallons are NOT the same.
Last updated: 2026-07-19
Conversions for 1 gal (UK)
UK gallon
1gal (UK)
Millilitres
4546.09ml
Litres
4.546l
US gallon
1.201gal (US)
UK pint
8pt (UK)
US pint
9.608pt (US)
🔒Calculated in your browser. No data is uploaded — GDPR friendly.
The one that catches people: a UK gallon (4.546 litres) and a US gallon (3.785 litres) are not the same size! UK fuel pumps use imperial gallons and pubs use imperial pints (568 ml), while a US pint is only 473 ml. This tool keeps UK and US gallons/pints clearly separated from metric, so imported goods and overseas data convert cleanly.
Frequently asked questions
Is a UK gallon the same as a US gallon?
No. A UK (imperial) gallon = 4.546 litres; a US gallon = 3.785 litres — about 20% smaller. UK fuel economy (mpg) uses imperial gallons, so a UK "40 mpg" is better than a US "40 mpg". Never mix them up.
How many litres in a UK gallon?
1 UK (imperial) gallon = 4.546 litres. So 5 gallons ≈ 22.7 litres. This is the gallon used at UK fuel pumps and for UK MPG figures — not the smaller US gallon.
How many ml in a UK pint?
1 UK pint = 568 ml. A half pint is 284 ml. This is the pint used in British pubs and for milk bottles. A US pint is smaller, at 473 ml.
Why is a UK pint bigger than a US pint?
A UK pint = 568 ml (20 fl oz); a US pint = 473 ml (16 fl oz). This is why a pint of beer in a British pub feels generous — it genuinely is bigger than the American version.
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