Is a US gallon the same as a UK gallon?

No, and the difference is large. A US gallon is about 3.785 litres, while a UK (imperial) gallon is about 4.546 litres, roughly 20 percent bigger. US and UK pints and fluid ounces differ too, so always check which system a figure uses before converting.

How many millilitres are in a cup?

A US cup is about 237 millilitres. Cups vary by country, though: a metric cup is 250 millilitres and other regions differ, so a recipe that calls for cups is worth checking against the converter rather than assuming.

How accurate are the conversions?

Each conversion uses the exact, internationally defined factor for the unit, not a rounded approximation, so the maths is precise. The result is shown to several significant figures and rounded only for display. For everyday and most professional use, the figures are exact to well beyond the precision you need.

Does this work offline and is anything sent to a server?

The conversion runs entirely in your browser, so nothing you type is sent anywhere, and once the page has loaded it keeps working with no connection. There is no sign-up and no limit on how many conversions you make.

Volume Converter

Convert volume and capacity between litres, millilitres and cubic metres, and US and UK gallons, quarts, pints, cups, fluid ounces, tablespoons and teaspoons. Type a value and see it in every unit. Free, instant and exact.

Exact, standard factors
100% free
No sign-up, no app
Instant as you type
Works offline after first load

Read the guide: How to Convert ml to Cups

Convert

From

0.26417205gal

1 L = 0.26417205 gal

1 L in every unit

Millilitre1,000 ml

Litre1 L

Cubic metre0.001 m³

Teaspoon (US)202.88414 tsp

Tablespoon (US)67.628045 tbsp

Fluid ounce (US)33.814023 fl oz

Cup (US)4.2267528 cup

Pint (US)2.1133764 pt

Quart (US)1.0566882 qt

Gallon (US)0.26417205 gal

Gallon (UK)0.21996925 gal

How to use it

1
Enter a value

Type the number you want to convert. The result updates as you type, with no button to press.
2
Pick the units

Choose what you are converting from and to. Swap them with one click if you need the reverse.
3
Read or copy

See the exact result, plus a table of your value in every unit. Copy any line you need.

When it comes in handy

Cooking and baking

Convert millilitres to cups, or tablespoons to millilitres, when a recipe uses units your measuring set does not.

US and UK measures

Switch between US and UK gallons and pints, which are not the same size, to avoid a costly mix-up.

Fuel and fluids

Convert litres to gallons for fuel, or for any container measured in the other system.

Instant, exact & 100% in your browser

The conversion runs right here in your browser using exact, standard factors. Nothing you type is sent to a server, there is no sign-up and no limit, and once the page has loaded it keeps working even with no connection.

Frequently asked questions

Is a US gallon the same as a UK gallon?: No, and the difference is large. A US gallon is about 3.785 litres, while a UK (imperial) gallon is about 4.546 litres, roughly 20 percent bigger. US and UK pints and fluid ounces differ too, so always check which system a figure uses before converting.
How many millilitres are in a cup?: A US cup is about 237 millilitres. Cups vary by country, though: a metric cup is 250 millilitres and other regions differ, so a recipe that calls for cups is worth checking against the converter rather than assuming.
How accurate are the conversions?: Each conversion uses the exact, internationally defined factor for the unit, not a rounded approximation, so the maths is precise. The result is shown to several significant figures and rounded only for display. For everyday and most professional use, the figures are exact to well beyond the precision you need.
Does this work offline and is anything sent to a server?: The conversion runs entirely in your browser, so nothing you type is sent anywhere, and once the page has loaded it keeps working with no connection. There is no sign-up and no limit on how many conversions you make.