Volume Converter
Convert volume between milliliters, liters, cubic centimeters, cubic meters, US fluid ounces, US cups, US pints, US quarts, US gallons, cubic inches, and cubic feet using exact conversion factors.
How It's Calculated
Formula
\text{result} = \text{value} \times \text{litersPerFromUnit} \div \text{litersPerToUnit}This calculator converts a volume quantity you already have from one unit to another — it is not the geometric Volume Calculator, which computes volume from shape dimensions like radius or side length. Every supported unit converts through one canonical base unit, the liter: the input value is multiplied by its unit's liters-per-unit factor, then divided by the target unit's factor. Metric units (milliliter, liter, cubic centimeter, cubic meter) use exact powers of ten. The US customary liquid units supported here — fluid ounce, cup, pint, quart, and gallon — are NOT Imperial units; they derive from the exact US liquid gallon definition of 3.785411784 liters (quart = gallon / 4, pint = gallon / 8, cup = gallon / 16, fluid ounce = gallon / 128). Cubic inch and cubic foot derive from the exact international length definitions (1 inch = 0.0254 m, 1 foot = 0.3048 m), cubed, then expressed in liters.
Worked Examples
US to metric: 1 US gallon to liters
- 1 US gallon is defined as exactly 3.785411784 liters
- 1 US gal x 3.785411784 L per US gal = 3.785411784 L
- Result: 1 US gallon is exactly 3.785411784 liters
Cubic length to metric: 1 cubic foot to liters
- Cube the linear foot-to-meter factor: (0.3048 m)³ = 0.028316846592 m³
- Convert cubic meters to liters: 0.028316846592 m³ x 1000 L per m³ = 28.316846592 L
- Result: 1 cubic foot is exactly 28.316846592 liters
Frequently Asked Questions
Is this the same as the Volume Calculator?
No. The Volume Calculator computes volume from a shape's dimensions (like a cube's side or a sphere's radius). This Volume Converter takes a volume you already know and converts it between units.
Are the US units here the same as Imperial units?
No. This calculator supports US customary liquid units (US fluid ounce, US cup, US pint, US quart, US gallon), not Imperial units. The Imperial gallon, pint, and fluid ounce use different definitions and different sizes, and are not supported here.
Why cube the linear conversion factor for cubic inches and cubic feet?
Volume scales with the cube of length, not linearly with it. Doubling every edge of a cube multiplies its volume by eight, not two — so a cubic-unit conversion factor must be the linear factor cubed, never the plain linear factor applied once.
Can I convert a negative or zero volume value?
Yes. This calculator treats volume as a generic numeric quantity and converts zero and negative values the same way as positive ones, consistent with how this project's other unit converters (length, weight, area) handle these inputs.