Volume converter
Volume has the most traps of any category: the US and UK gallon, pint and fluid ounce all differ, and there are three common cup sizes. Every unit in the list says which system it belongs to.
10 L = 2.641720524 US gal
Formula: US gal = L ÷ 3.785411784
10 L in every volume unit
- millilitre
- cubic metre
- teaspoon (US)
- tablespoon (US)
- fluid ounce (US)
- cup (US customary)
- cup (US legal, nutrition label)
- cup (metric)
- pint (US liquid)
- quart (US liquid)
- gallon (US)
- fluid ounce (imperial)
- pint (imperial)
- gallon (imperial)
- cubic inch
- cubic foot
Popular volume conversions
How it works
Which cup? Which gallon?
Volume is where most kitchen and fuel mistakes come from, because the same word names different amounts.
1 cup = 8 US fl oz = 236.588 236 5 mL. Source: NIST Handbook 44, App. C.
US recipes use the customary cup; US nutrition labels use the 240 mL legal cup; Australia, Canada and New Zealand use 250 mL.
Every volume unit, defined
Each unit expressed in litres, with its exact definition and source.
| Unit | In L | Definition | Source |
|---|---|---|---|
| millilitre (mL) | 0.001 | 1 mL = 1 cm³ = 0.001 L | BIPM SI Brochure |
| litre (L) | 1 | 1 L = 1 dm³ = 0.001 m³ | BIPM SI Brochure |
| cubic metre (m³) | 1,000 | 1 m³ = 1000 L | BIPM SI Brochure |
| teaspoon (US) (tsp) | 0.00492892159375 | 1 tsp = 1/3 tbsp = 4.928 921 593 75 mL | NIST Handbook 44, App. C |
| tablespoon (US) (tbsp) | 0.01478676478125 | 1 tbsp = 1/2 US fl oz = 14.786 764 781 25 mL | NIST Handbook 44, App. C |
| fluid ounce (US) (US fl oz) | 0.0295735295625 | 1 US fl oz = 1/128 US gal = 29.573 529 562 5 mL | NIST Handbook 44, App. C |
| cup (US customary) (cup) | 0.2365882365 | 1 cup = 8 US fl oz = 236.588 236 5 mL | NIST Handbook 44, App. C |
| cup (US legal, nutrition label) (legal cup) | 0.24 | 1 legal cup = 240 mL | FDA 21 CFR 101.9(b)(5)(viii) |
| cup (metric) (metric cup) | 0.25 | 1 metric cup = 250 mL | Standards Australia / Canada cooking convention |
| pint (US liquid) (US pt) | 0.473176473 | 1 US pt = 16 US fl oz = 473.176 473 mL | NIST Handbook 44, App. C |
| quart (US liquid) (US qt) | 0.946352946 | 1 US qt = 2 US pt = 946.352 946 mL | NIST Handbook 44, App. C |
| gallon (US) (US gal) | 3.785411784 | 1 US gal = 231 in³ = 3.785 411 784 L | NIST Handbook 44, App. C |
| fluid ounce (imperial) (imp fl oz) | 0.0284130625 | 1 imp fl oz = 1/160 imp gal = 28.413 062 5 mL | UK Weights and Measures Act 1985 |
| pint (imperial) (imp pt) | 0.56826125 | 1 imp pt = 20 imp fl oz = 568.261 25 mL | UK Weights and Measures Act 1985 |
| gallon (imperial) (imp gal) | 4.54609 | 1 imp gal = 4.546 09 L exactly | UK Weights and Measures Act 1985 |
| cubic inch (in³) | 0.016387064 | 1 in³ = (2.54 cm)³ = 16.387 064 mL | NIST SP 811, App. B (1959 yard & pound agreement) |
| cubic foot (ft³) | 28.316846592 | 1 ft³ = (0.3048 m)³ = 28.316 846 592 L | NIST SP 811, App. B (1959 yard & pound agreement) |
Questions
How many litres are in a gallon?
A US gallon is exactly 3.785 411 784 L. An imperial (UK) gallon is exactly 4.546 09 L.
How many millilitres are in a cup?
A US customary cup is 236.588 236 5 mL. US nutrition labels use 240 mL, and the metric cup used in Australia, Canada and New Zealand is 250 mL.
How many mL are in a fluid ounce?
A US fluid ounce is 29.573 529 562 5 mL; an imperial fluid ounce is 28.413 062 5 mL.
How many teaspoons are in a tablespoon?
Three US teaspoons make one US tablespoon (14.79 mL). Australian tablespoons are 20 mL, or four teaspoons.
Can I convert cups of flour to grams here?
Not directly. Cups measure volume and grams measure mass, so you need the density of the ingredient; flour, sugar and butter all differ.