A comprehensive volume unit converter supporting 30+ units across metric, imperial, US customary, cooking, and industrial systems. Convert instantly between any two volume units.
Volume unit conversion translates a measurement from one unit to another while preserving the actual quantity. The key is knowing the conversion factor between units. All volume units can be converted through a common reference — the cubic meter (m³) or liter (L).
Volume units span 5 systems: metric cubic (mm³, cm³, m³), metric liquid (mL, L), US liquid (fl oz, cup, gal), Imperial (Imp gal, Imp fl oz), and cooking (tsp, tbsp, cup).
To convert between any two units, use this chain: Value × (source unit in m³) ÷ (target unit in m³) = result.
Or use common shortcuts:
100 ÷ 236.59 = 0.423 US cups.
5 × 3.785 = 18.93 liters.
2 × 35.314 = 70.63 cubic feet.
3 × 14.787 = 44.36 mL.
35 free volume calculation tools — click any calculator to get started.
Answers to common questions about the volume unit converter.
Use exact conversion factors (not rounded). For example: 1 US gallon = 3.785411784 liters exactly (not 3.79 or 3.8). Our calculator uses exact IEEE 754 double-precision values for all conversions.
Key bridges: 1 inch = 2.54 cm → 1 in³ = 16.387 cm³. 1 foot = 30.48 cm → 1 ft³ = 28,316.85 cm³ = 28.317 L. 1 US gallon = 3.785 L. 1 Imp gallon = 4.546 L.
No. Cooking measures (cups, teaspoons) have legal definitions but practical variation. A "cup" varies: US = 236.59 mL, metric = 250 mL, Imperial = 284.13 mL, Japanese = 200 mL. Always specify which cup in recipes.
In the US system, dry and liquid measures differ. A US dry pint = 550.61 mL vs US liquid pint = 473.18 mL. Metric system uses the same units (mL, L) for both dry and liquid, simplifying conversions.
Different systems evolved independently: the metric system (France, 1790s), Imperial system (UK, 1824), and US customary (inherited from British colonial measures but diverged). International trade is gradually standardizing on metric (SI).