Cooking Unit Converter
🇬🇧 United Kingdom version
A British recipe may call for an imperial pint of milk, a gas mark 6 oven and a cup that nobody has defined in law. This converter uses the UK’s own pint, fluid ounce and 15 mL spoon, a 250 mL metric cup, an ingredient weight for 50 foods and a temperature tab that includes gas marks.
Use Cooking Unit Converter online
Cooking Unit Converter
Convert between cups, spoons, millilitres, grams and ounces — with real ingredient densities, so a cup of flour and a cup of honey do not weigh the same.
What are you converting?
Starts at United Kingdom's usual cup; your choice is kept. Spoons follow United Kingdom: a tablespoon is 15 mL.
125 g per US cup · spooned and levelled — only used when converting between volume and weight
The same amount, every way
Weight figures assume flour, plain / all-purpose. Click any tile to copy it.
United Kingdom rules and figures
- The imperial pint is set in UK law as 0.568261 litres, and a fluid ounce is one twentieth of it, which is 28.413 millilitres.
- UK law does not define a kitchen cup; the usual metric cup of 250 millilitres is used here, and you can pick another standard.
- NHS patient leaflets use 15 millilitre and 5 millilitre spoons, which are the tablespoon and teaspoon sizes on this page.
- UK ovens are marked in Celsius, and many carry gas marks too, so the temperature tab opens in Celsius with gas mark shown.
Sources: Weights and Measures Act 1985, Schedule 1 (checked 2026-11-08); NHS Frimley Health: Liquidised diet (checked 2026-11-08)
How the Cooking Unit Converter works
Volumes are stored in millilitres and weights in grams. Between volume and weight the tool multiplies by the chosen ingredient’s grams per millilitre, which it derives from the weight of a US customary cup of 236.588 mL.
grams = millilitres × (grams per US cup ÷ 236.588); fan oven °C = conventional °C − 20
- The UK set of measures is a 15 mL tablespoon, a 5 mL teaspoon, the imperial fluid ounce of 28.413 mL and the imperial pint of 568.261 mL. US spoons and the US pint appear separately under measures from other countries.
- The cup starts as the metric 250 mL cup. Use Cup standard for the US customary 236.588 mL cup when a recipe comes from America.
- Plain flour is 125 g per US cup, so a 250 mL cup comes to 132.1 g. Whole milk is 244 g per US cup and caster sugar 200 g.
- Gas mark takes the nearest of nine points from 135 °C at mark 1 to 246 °C at mark 9.
How to use the Cooking Unit Converter
- Type an amount. Enter the quantity from the recipe, such as 1 or 568, in the Amount box.
- Choose the units. Pick units in From and To. Kitchen measures in UK lists the imperial pint and fluid ounce, plus the 15 mL spoon.
- Pick the ingredient. When crossing from volume to weight, set Ingredient so that the tool knows how heavy a millilitre of it is.
- Check the cup. Set Cup standard if the recipe uses American cups; the metric cup is selected for the UK.
- Set the oven. The Oven temperature tab takes degrees Celsius and gives Fahrenheit, gas mark and a fan setting 20 degrees lower.
Example: A pint of milk, a metric cup of flour and a gas mark 6 oven
An imperial pint is 568.261 mL, and whole milk at 244 g per US cup weighs 586.1 g. A 250 mL cup of plain flour weighs 132.1 g, and a 15 mL tablespoon of caster sugar 12.7 g. A hot oven at 200 °C is 392 °F, which is gas mark 6, or 180 °C (356 °F) on fan.
When to use the Cooking Unit Converter
- Using a US recipe in a UK kitchen. Convert American cups and fluid ounces to millilitres and grams for the right ingredient, then weigh them on your scale.
- Cooking from a grandparent’s recipe. Turn a pint, fluid ounces and a gas mark into millilitres and Celsius, with a fan-oven setting alongside.
- Swapping caster for icing sugar. Compare the grams per cup of each in the weights tab before substituting by volume.
- Baking from a Fahrenheit recipe. Type 350 and pick Fahrenheit to get Celsius, gas mark and a fan-oven temperature.
What the Cooking Unit Converter does not do
- Ingredient weights are fixed single figures, mostly spooned-and-levelled. A packed cup of flour can weigh 20% more, so use them as a starting point.
- Only 50 ingredients are listed. Anything else, such as grated carrot or chopped onion, needs a weight from the packaging.
- The fan-oven setting is a flat reduction of 20 °C. Some ovens and recipes call for 25 °C.
- Volume units cover US, imperial, Australian and Indian katori sizes only; Japanese cups and metric spoons beyond the listed ones are absent. A pint or fluid ounce is not offered as a local unit in countries with no official size.
- The converter does not scale a recipe or change cooking times.
When something else is a better fit
- When you want to scale a whole recipe for more or fewer servings, use the Recipe Scaler.
- When you need general length, weight or temperature conversion, use the Unit Converter.
- When you need exact weights for baking science, use a kitchen scale and the weights printed by the recipe's author.
Questions about the Cooking Unit Converter
How many millilitres are in an imperial pint?
An imperial pint is 568.261 mL, which is 20 imperial fluid ounces of 28.413 mL. A US pint is only 473.176 mL, so a UK pint is about 20% larger and the tool lists both.
How much does a cup of flour weigh in grams?
132.1 g for a 250 mL metric cup of plain flour, from a figure of 125 g per US customary cup. A US cup of 236.588 mL gives exactly 125 g. Packed or scooped flour weighs more.
What gas mark is 180 degrees Celsius?
Gas mark 4, the nearest of the nine fixed points. For a fan oven the tool gives 160 °C, 20 degrees lower, which is 320 °F.
Is a UK tablespoon 15 millilitres?
Yes, the tool uses 15 mL for a tablespoon and 5 mL for a teaspoon, as NHS leaflets do. An Australian tablespoon is 20 mL, and the tool lists that measure separately so that you can convert it.
Which cup does a UK recipe mean?
It usually means 250 mL, but recipes from American books mean 236.588 mL. Change Cup standard to match the book. The difference is about 6%, which shows up in baking.