Volume Converter

How it is calculated

Enter a volume and pick its unit. The tool first converts it to litres, then divides by each target unit's size in litres to show all units at once. Factors used: 1 mL = 0.001 L, 1 m³ = 1,000 L, 1 US gallon = 3.785411784 L, 1 US quart = 0.946352946 L, 1 US pint = 0.473176473 L, 1 US cup = 0.2365882365 L and 1 US fluid ounce = 0.0295735296 L. The formula is result = value × (litres per input unit) / (litres per output unit).

Gallons, quarts, pints, cups and fluid ounces are the US liquid units, which are smaller than their British imperial namesakes. Each result is rounded to two decimals, so a tiny volume in a large unit (such as 0.01 m³) loses detail; switch to a smaller unit for precision.

Common mistakes

• Assuming a gallon is the same everywhere. A UK imperial gallon is about 4.546 L, but this tool uses the US gallon of 3.785 L.
• Confusing fluid ounces (volume) with ounces (weight). A fluid ounce of water weighs close to, but not exactly, an ounce.
• Choosing the wrong input unit and not noticing; the default is litres.
• Reading 0.01 m³ as exactly 10 L. The display is rounded to two decimals, so use litres for small volumes.