Volume conversion chart
Convert between units of volume: litres and millilitres against US gallons, quarts, cups, and fluid ounces, plus cubic metres and feet. Note that US and imperial gallons differ, so these use US measures.
Common volume conversions (US measures)
| Unit | Equivalent |
|---|---|
| 1 litre | 1,000 millilitres |
| 1 litre | 0.2642 US gallons (1.057 US qt) |
| 1 US gallon | 3.785 litres (4 quarts) |
| 1 US gallon | 128 fluid ounces |
| 1 US quart | 0.946 litres |
| 1 US cup | 236.6 millilitres |
| 1 US fluid ounce | 29.57 millilitres |
| 1 cubic metre | 1,000 litres |
| 1 cubic foot | 28.32 litres (7.481 US gal) |
A millilitre is exactly one cubic centimetre, linking volume to length. The US gallon used here is about 3.785 litres; the imperial gallon used in the UK is larger, about 4.546 litres, so always check which gallon a figure refers to.
Need other measures?
See the Metric Conversion Chart and the Weight Conversion Chart.
Litres and millilitres
The litre is the everyday metric volume unit, equal to 1,000 millilitres or one cubic decimetre. A single millilitre equals one cubic centimetre, which is why medical and engine volumes are quoted interchangeably in cc and mL. Converting within metric volume is just shifting the decimal.
US versus imperial gallons
The biggest pitfall in volume conversion is the gallon. The US gallon is about 3.785 litres, while the imperial gallon used in Britain is about 4.546 litres, roughly 20 percent larger. US and imperial fluid ounces, quarts, and pints differ too, so a recipe or fuel figure can be off significantly if the wrong gallon is assumed.
FAQ
How many millilitres are in a litre?
1,000 millilitres. One millilitre also equals exactly one cubic centimetre.
How many litres in a US gallon?
About 3.785 litres. The imperial (UK) gallon is larger, about 4.546 litres.
How many fluid ounces in a US gallon?
128 US fluid ounces, which is 4 quarts or 8 pints.