Volume Converter
Convert volume units. US and UK (imperial) gallons are different sizes. Exact factors, a quick reference table and worked examples.
10 L = 2.641721 gal (US)
The same value in every unit
| Unit | Symbol | Value |
|---|---|---|
| Cubic meter | m³ | 0.01 |
| Liter | L | 10 |
| Milliliter | mL | 10 000 |
| Cubic centimeter | cm³ | 10 000 |
| Cubic inch | in³ | 610.2374 |
| Cubic foot | ft³ | 0.3531467 |
| Cubic yard | yd³ | 0.01307951 |
| US gallon | gal (US) | 2.641721 |
| UK (imperial) gallon | gal (UK) | 2.199692 |
| US quart | qt | 10.56688 |
| US fluid ounce | fl oz | 338.1402 |
How to convert volume units
Every volume unit is related to one base unit (Cubic meter, m³) by an exact factor. To convert, multiply by the factor of the unit you start from and divide by the factor of the unit you want.
value in new unit = value × (factor of old unit ÷ factor of new unit)
For example, 1 L = 0.001 m³ and 1 gal (US) = 0.003785412 m³, so 1 L = 0.2641721 gal (US).
Quick reference table
How many of the units in the column headings make up one of the unit in each row.
| One… | = m³ | = L | = mL | = cm³ | = in³ | = ft³ |
|---|---|---|---|---|---|---|
| 1 m³ | 1 | 1 000 | 1 000 000 | 1 000 000 | 61 023.74 | 35.31467 |
| 1 L | 0.001 | 1 | 1 000 | 1 000 | 61.02374 | 0.03531467 |
| 1 mL | 1 × 10⁻⁶ | 0.001 | 1 | 1 | 0.06102374 | 3.53147 × 10⁻⁵ |
| 1 cm³ | 1 × 10⁻⁶ | 0.001 | 1 | 1 | 0.06102374 | 3.53147 × 10⁻⁵ |
| 1 in³ | 1.63871 × 10⁻⁵ | 0.01638706 | 16.38706 | 16.38706 | 1 | 0.0005787037 |
| 1 ft³ | 0.02831685 | 28.31685 | 28 316.85 | 28 316.85 | 1 728 | 1 |
| 1 yd³ | 0.7645549 | 764.5549 | 764 554.9 | 764 554.9 | 46 656 | 27 |
| 1 gal (US) | 0.003785412 | 3.785412 | 3 785.412 | 3 785.412 | 231 | 0.1336806 |
| 1 gal (UK) | 0.00454609 | 4.54609 | 4 546.09 | 4 546.09 | 277.4194 | 0.1605437 |
| 1 qt | 0.0009463529 | 0.9463529 | 946.3529 | 946.3529 | 57.75 | 0.03342014 |
| 1 fl oz | 2.95735 × 10⁻⁵ | 0.02957353 | 29.57353 | 29.57353 | 1.804688 | 0.001044379 |
Common values: L to gal (US)
| Liter (L) | US gallon (gal (US)) |
|---|---|
| 1 L | 0.2641721 gal (US) |
| 2 L | 0.5283441 gal (US) |
| 5 L | 1.32086 gal (US) |
| 10 L | 2.641721 gal (US) |
| 20 L | 5.283441 gal (US) |
| 50 L | 13.2086 gal (US) |
| 100 L | 26.41721 gal (US) |
| 200 L | 52.83441 gal (US) |
| 500 L | 132.086 gal (US) |
| 1 000 L | 264.1721 gal (US) |
Worked examples
Convert 10 L to gal (US)
- 1 L = 0.001 m³ and 1 gal (US) = 0.003785412 m³.
- 10 × 0.001 ÷ 0.003785412 = 2.641721 gal (US).
Convert 50 mL to m³
- 1 mL = 1 × 10⁻⁶ m³ and 1 m³ = 1 m³.
- 50 × 1 × 10⁻⁶ ÷ 1 = 5 × 10⁻⁵ m³.
Convert 250 fl oz to L
- 1 fl oz = 2.95735 × 10⁻⁵ m³ and 1 L = 0.001 m³.
- 250 × 2.95735 × 10⁻⁵ ÷ 0.001 = 7.393382 L.
The units explained
| Unit | Symbol | Exact factor | Where it is used |
|---|---|---|---|
| Cubic meter | m³ | 1 m³ = 1 m³ | SI unit; tanks, rooms |
| Liter | L | 1 L = 0.001 m³ | Fluids, engines |
| Milliliter | mL | 1 mL = 1 × 10⁻⁶ m³ | Lab, small fluid amounts |
| Cubic centimeter | cm³ | 1 cm³ = 1 × 10⁻⁶ m³ | Engine size, lab |
| Cubic inch | in³ | 1 in³ = 1.63871 × 10⁻⁵ m³ | US engine displacement, parts |
| Cubic foot | ft³ | 1 ft³ = 0.02831685 m³ | US air and gas volumes |
| Cubic yard | yd³ | 1 yd³ = 0.7645549 m³ | US concrete, earthworks |
| US gallon | gal (US) | 1 gal (US) = 0.003785412 m³ | US fuel and liquids |
| UK (imperial) gallon | gal (UK) | 1 gal (UK) = 0.00454609 m³ | UK fuel and liquids |
| US quart | qt | 1 qt = 0.0009463529 m³ | US oil and liquids |
| US fluid ounce | fl oz | 1 fl oz = 2.95735 × 10⁻⁵ m³ | US small liquid quantities |
Key facts
- 1 L = 1 000 cm³ = 0.001 m³. A US gallon is 231 in³ = 3.785 L; a UK gallon is 4.546 L.
- Cylinder volume V = π × d² × h ÷ 4. Sphere volume V = π × d³ ÷ 6.
- 1 m³ of water has a mass of about 1 000 kg.
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FAQ
How many US gallon units are in one Liter?
1 L = 0.2641721 gal (US).
How do I convert L to gal (US)?
Multiply by 0.2641721 (the factor 0.001 ÷ 0.003785412). To go back, divide by 0.2641721 or multiply by 3.785412.
What is the cubic meter (m³) used for?
SI unit; tanks, rooms.
What is the liter (L) used for?
Fluids, engines.
Are the conversion factors exact?
Where a unit is defined exactly (the inch is 25.4 mm, the pound is 0.45359237 kg, standard gravity is 9.80665 m/s²) the factor is exact; others are given to ten or more digits. Results are shown to seven significant digits.
References
- NIST Special Publication 811, Guide for the Use of the International System of Units (SI), and NIST Handbook 44, Appendix C (general tables of units of measurement).
- BIPM, The International System of Units (SI Brochure), 9th edition; ISO 80000 (quantities and units).
Last reviewed: November 2026.