Converters
Convert volume between litres, millilitres, cubic metres, and US gallons — type a value and see all four units at once.
Results update as you type. No calculate button. All calculations run locally in your browser.
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| Unit | Value |
|---|
All four units describe the same volume; gallons here are US liquid gallons, not UK imperial gallons.
Convert the source value to litres, then divide by the target unit's litre factor: target = value × source factor ÷ target factor.
| Unit | Litres per unit |
|---|---|
| Litre (L) | 1 |
| Millilitre (mL) | 0.001 |
| Cubic metre (m³) | 1,000 |
| US liquid gallon (gal) | 3.785411784 |
The US gallon factor is exact by definition. A UK imperial gallon is larger (4.54609 L) and is not used here.
1 L ÷ 3.785411784 L/gal = 0.264172 US gal, and 1 L = 1,000 mL = 0.001 m³. Conversely, 10 US gal × 3.785411784 = 37.854118 L.
Negative volumes are rejected as invalid. Display values are rounded to 6 decimal places; the underlying calculation is not rounded. If your recipe or tank uses imperial gallons, multiply the US-gallon result by 0.832674 to get imperial gallons (since 3.785411784 ÷ 4.54609 = 0.832674).
US liquid gallon (3.785411784 L). A UK imperial gallon is 4.54609 L, about 20% larger — mixing them up is the most common volume-conversion error.
1,000 litres, exactly.
1,000 mL, exactly.
Not on this page: 1 US fluid ounce = 0.0295735295625 L. Convert fluid ounces to litres first and enter that value.
No — this is a pure unit conversion. Real liquids expand with temperature, but that is a physical measurement question, not a unit conversion.
Results are estimates only and do not constitute professional advice.