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ToolBoxGenie

Volume Converter

Converters · Added 9 August 2026

Convert a volume between metric, US customary and imperial units — keeping US and imperial gallons, pints and fluid ounces properly distinct.

Result

1 cup in millilitre

236.588237 ml

1 cup = 236.588237 ml

The same value in every unit

Millilitre (ml)
236.588237
Litre (L)
0.236588237
Cubic metre (m³)
0.000236588236
Teaspoon (US) (tsp)
48
Tablespoon (US) (tbsp)
16
Fluid ounce (US) (fl oz)
8
Cup (US) (cup)
1
Pint (US) (pt)
0.5
Quart (US) (qt)
0.25
Gallon (US) (gal)
0.0625
Fluid ounce (imperial) (fl oz)
8.32674185
Pint (imperial) (pt)
0.416337092
Gallon (imperial) (gal)
0.0520421365
Cubic inch (in³)
14.4375
Cubic foot (ft³)
0.00835503472

US and imperial measures share names but not sizes: an imperial pint is 568 ml against the US pint's 473 ml, and an imperial gallon is about 20% larger than a US one. Pick the family your recipe or spec actually uses.

How to use the volume converter

  1. 1Enter the volume you want to convert.
  2. 2Choose the unit. US customary and imperial units are in separate groups, because a US pint and an imperial pint are genuinely different sizes.
  3. 3Read the result, plus the same volume in every other unit below it.
  4. 4For a recipe measured in ounces by weight rather than fluid ounces, use the weight converter instead.

Examples

A US recipe in cups

Input
2 cups (US)
Result
473.176473 millilitres

Usually rounded to 475 ml, or 500 ml if the recipe is forgiving.

Fuel economy figures

Input
10 gallons (US)
Result
37.8541178 litres

An imperial gallon is 4.546 litres, about 20% larger, so US and UK miles-per-gallon figures are not comparable.

A water tank

Input
1.5 cubic metres
Result
1,500 litres

One cubic metre is exactly 1,000 litres — the cleanest conversion in the set.

About the volume converter

Three systems sharing one vocabulary

Volume is the messiest quantity to convert, because US customary and imperial units use identical names for different sizes. Gallon, quart, pint and fluid ounce all exist in both systems and none of them match. Metric units are unambiguous by comparison: a litre is a litre everywhere.

The practical rule is to establish which system your source uses before converting anything. A recipe from an American site uses US cups and fluid ounces; a British cookbook uses imperial pints and often metric grams alongside them. Getting this wrong changes quantities by 20%, which matters in baking and barely shows in a stew.

Cooking, and why volume measures cause trouble

American recipes measure dry ingredients by volume — cups of flour, cups of sugar — while most of the rest of the world weighs them. Volume is a poor proxy for quantity with anything compressible: a cup of flour can vary by 20% depending on whether it was scooped or spooned into the cup.

Converting the volume accurately, as this tool does, is only half the job. If you can, weigh the ingredient instead: a cup of flour is about 120 g, a cup of granulated sugar about 200 g, and a cup of water exactly 236.6 g. Those substitutions remove the packing problem entirely.

Frequently asked questions

Is a US pint the same as a UK pint?
No. A US pint is 473 ml; an imperial pint is 568 ml, about 20% larger. The same gap applies to gallons and quarts. This is why a British pint of beer is noticeably bigger than an American one, and why converting a recipe with the wrong family throws proportions off badly.
How many millilitres are in a cup?
A US customary cup is 236.588 ml, almost always rounded to 240 ml in nutrition labelling and to 250 ml in metric recipe books. If precision matters — in baking especially — use the exact figure rather than the rounded one.
Is a fluid ounce the same as an ounce?
No, and mixing them up ruins recipes. A fluid ounce measures volume, about 29.6 ml in the US. An ounce measures weight, about 28.35 g. They happen to be similar numbers for water by coincidence, and diverge completely for flour, oil or sugar. Weight belongs in the weight converter.
Why does a US fluid ounce differ from an imperial one?
The imperial system redefined the gallon in 1824 as the volume of ten pounds of water, while the US kept the older English wine gallon. An imperial fluid ounce is 28.4 ml against the US 29.6 ml — so the imperial fluid ounce is smaller even though the imperial pint and gallon are larger, because an imperial pint contains 20 fluid ounces and a US pint only 16.