Volume converter
Convert one volume into 17 metric, US and imperial units at once
Pick the units at both ends to see the result. Note that the US and imperial gallon, quart, pint and fluid ounce are not the same.
This affects display only. Conversion always uses full precision.
| Unit | Symbol | Result |
|---|---|---|
| Cubic metre | m³ | |
| Litre | L | |
| Decilitre | dL | |
| Millilitre | mL | |
| Cubic centimetre | cm³ | |
| Cubic yard | yd³ | |
| Cubic foot | ft³ | |
| Cubic inch | in³ | |
| Barrel (oil) | bbl | |
| Gallon (US) | gal(US) | |
| Gallon (UK) | gal(UK) | |
| Quart (US) | qt(US) | |
| Quart (UK) | qt(UK) | |
| Pint (US) | pt(US) | |
| Pint (UK) | pt(UK) | |
| Fluid ounce (US) | fl oz(US) | |
| Fluid ounce (UK) | fl oz(UK) |
Example
Input
1 gal(US)
Example result
L 3.785411784 mL 3785.411784 gal(UK) 0.832674184629 fl oz(US) 128
Both are called gallons, but the US one is about 20 percent smaller, so check which a document means.
Technical details & limits
Conversions run through the cubic metre. The US and imperial gallon, quart, pint and fluid ounce each use their own defined values and are not interchangeable. The barrel is the 42-US-gallon oil barrel.
About this tool
Enter a value and pick its unit to get every other volume unit at once: metric cubic metre, litre, decilitre, millilitre and cubic centimetre, the cubic yard, cubic foot and cubic inch, the separate US and imperial gallon, quart, pint and fluid ounce, and the oil barrel.
Use cases
- Convert fuel figures given in US gallons into litres.
- Turn fluid ounces in a recipe into millilitres.
- Cross-check container capacity in cubic metres and cubic feet.
How to use
- Type a number. Decimals and scientific notation such as 1.5e3 are accepted.
- Pick the unit the value is in and the unit you want it in. The ⇄ button swaps the two.
- The summary line gives the target unit; the table below lists the metric units alongside the separate US and imperial capacity units.
- Adjust the significant digits for a shorter or longer number. The conversion itself always runs at full precision.
Notes
The US and imperial gallon, quart, pint and fluid ounce are all different; picking the wrong system introduces an error of roughly 20 percent. The barrel here is the 42-US-gallon oil barrel; barrels in brewing or chemicals may hold something else.
FAQ
- How many liters are in US and imperial gallons?
- US liquid gallons and imperial gallons differ in volume and must be selected separately. 1 US gallon equals 3.785411784 liters, while 1 imperial gallon equals 4.54609 liters. A source that says only gallon leaves the system ambiguous. Confirm that convention before comparing fuel quantities or container capacities, because choosing the wrong gallon changes the physical volume even when the original numeric amount was copied correctly.
- How many milliliters and cubic centimeters are in one liter?
- 1 liter equals 1000 milliliters and 1000 cubic centimeters. This tool converts through a cubic-meter base and displays other supported capacity units for the same volume. The result does not automatically provide mass: converting a liquid quantity into kilograms additionally requires its density under the relevant conditions. Keep volume and mass units separate when using the result in a recipe, inventory record, or technical calculation.
- How many US gallons and liters are in the tool's oil barrel?
- The barrel in this tool means an oil barrel: 1 barrel equals 42 US gallons, or 158.987294928 liters. Barrels in other industries may have different capacities. Verify the source definition before using a conversion for shipping or inventory, rather than relying on the unit name alone. This calculation standardizes the stated volume and does not determine the contents' mass or their volume under different temperature conditions.
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