Calculator
Unit conversion
Equivalent quantities with the calculation shown below.
Equivalent values
| Unit | Value |
|---|---|
| Millilitre (mL) | 1,000,000 |
| Litre (L) | 1,000 |
| Cubic metre (m³) | 1 |
| Cubic centimetre (cm³) | 1,000,000 |
Distinguish geometric, usable and nominal capacity
1 m³ = 1000 L and 1 L = 1000 mL; 1 cm³ and 1 mL describe the same volume. A tank’s geometric volume, usable fill amount and nominal catalogue capacity may differ. Unit conversion cannot determine those scopes. Turning a level percentage into litres requires tank geometry or a manufacturer’s level-to-volume curve; percentage level is not linear with volume for every tank shape.
Volume, flow rate and filling time
L and m³ measure an amount; L/s and m³/h measure an amount per unit time. Converting flow into volume therefore requires time. A constant 2 L/s for 15 minutes gives 2 × 15 × 60 = 1800 L. If flow varies, multiplying one instantaneous reading by the full duration may give an incorrect total. This tool uses volume units; account for the time interval separately in a flow calculation.
Converting litres into kilograms needs density
Mass and volume are related by m = ρ × V. With an illustrative density of 1000 kg/m³, 0.25 m³ gives 250 kg. Do not automatically apply that density to oil or a glycol mixture. Temperature matters when choosing density and interpreting a measured volume. Expressing a volume in another unit does not correct it to a reference temperature.
Worked examples
Tank capacity
2.5 m³ × 1000 = 2500 L. Reverse check: 2500 / 1000 = 2.5 m³.
Constant-rate filling
2 L/s × 900 s = 1800 L = 1.8 m³. The duration is fifteen minutes and flow is assumed constant throughout.
Sample container
250 mL = 250 cm³ = 0.25 L = 0.00025 m³. Pay attention to decimal places and exponential notation for small volumes.
Definitions and calculation method
Unit factors and temperature-scale relationships: NIST SP 811, Appendix B.8 ↗.
Application examples were prepared for this page. Values are converted through the reference unit before display rounding; displayed results use up to 12 significant digits. A converted reading retains the uncertainty of the original measurement.