How it works
How Volume Converter solves the problem
Volume Converter takes the same method a textbook or spec sheet would recommend and wraps it in a widget — you get the answer, the formula and a sense of when the number breaks down.
The UK and US gallon are different; do not assume. Double-check by converting back — then convert it and the rest of this page explains what the answer means.
1 UK pint = 568.261 ml (US pint is only 473.176 ml — be careful). 1 UK gallon = 4.54609 L. 1 fl oz (UK) = 28.413 ml. 1 cup in British recipes is typically 250 ml.
Seeing it on real numbers
A working example keeps the formula honest:
1 UK pint = 568.261 ml (US pint is only 473.176 ml — be careful). 1 UK gallon = 4.54609 L. 1 fl oz (UK) = 28.413 ml. 1 cup in British recipes is typically 250 ml.
Scenarios where Volume Converter pays off
Volume Converter is aimed at people arriving with questions like these:
- "Ml to oz"
- "Pints to ml"
- "Cups to ml"
- "Gallons to litres"
- "Uk vs us pint"
- "What is volume converter"
When it isn't the right tool
Every tool has an edge where it stops being the right answer. Volume Converter is no exception:
- For legally binding tax or medical decisions — cross-check with HMRC, NHS or a qualified professional.
- For very large or very small extremes the rounding error outgrows the useful precision.
- When the underlying rate or threshold has changed since the page was last reviewed — always verify with the primary source.
- When the input you have is already a derived figure (net of something) — feeding it in as "gross" will double-subtract.
Traps to steer around
Every time you convert it for a new scenario, one of these creeps in — it's worth knowing them ahead of time.
- Mixing up units — grams in one field, ounces in another, then wondering why the answer is off.
- Treating a percentage as a whole number. 20% means 0.20 in the maths, not 20.
- Rounding at every step. Keep four decimals internally and only round the final number.
- Using last year's thresholds. If the page isn't dated, assume it's stale and check GOV.UK.
- Reading a tool like this as advice. It is maths, not a decision — the decision is still yours.
The sources behind the numbers
Where the maths needs an external authority, we cross-check against:
- BIPM (SI)
- NIST
- GOV.UK Weights and Measures
Works well alongside
If this question keeps coming up for you, the same cluster of tools usually comes next:
- Length Converter — Convert between metres, centimetres, feet, inches, miles, kilometres and yards with full-precision factors and context on which unit is used where.
- Weight Converter — Convert kilograms, pounds, stones, ounces and tonnes with UK-friendly defaults — the UK still uses stones for body weight and pounds at the deli counter.
- Grams to Cups Converter — Convert grams to cups for flour, sugar, butter, rice and more — density-aware, because 1 cup of flour ≠ 1 cup of sugar.
How we keep this accurate
Our calculadoras run on pure, unit-tested functions — the same logic lives in the browser and in the CI test suite. When tax rates, thresholds or official figures move, the update lands within 24 hours of the announcement. You can read the editorial policy and corrections policy.
Found an out-of-date number on Volume Converter or anywhere else in the Conversions toolkit? Send it to the editorial desk and we'll patch it. Or browse the full calculadora directory for the next tool you need.
