Volume converter
Convert liters, milliliters, cubic meters, gallons and cups.
How the calculation works
Volume measures the space a liquid or solid takes up. The conversion goes through the liter, then to the target unit.
Key equivalences
- 1 L = 1,000 mL · 1 m³ = 1,000 L
- 1 US gallon = 3.785 L · 1 US cup ≈ 237 mL
- 1 tablespoon ≈ 15 mL
Step-by-step example
How many mL in 2.5 L? 2.5 × 1,000 = 2,500 mL.
Careful with US recipes
"Cup" and "tablespoon" are volume, not weight. A cup of flour and a cup of water have the same volume but different weight.
Examples
- 1 US gallon = 3.785 L.
- 750 mL = 0.75 L.
Frequently asked questions
How many mL in a cup?
The US cup is ~237 mL; metric cups are often 240–250 mL. Check the recipe's standard.
How many liters in 1 m³?
1,000 liters. That's why water bills are usually in m³.
Is the US gallon the same as the UK one?
No. The US gallon is 3.785 L; the UK (imperial) is 4.546 L. This calculator uses the US one.
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Updated on June 17, 2026 · by Rafael Rossi · Methodology & sources