Volume converter
Convert any volume via the SI cubic metre. Exact BIPM / NIST factors — see the arithmetic for your input, plus a table of every equivalent.
Defaults to your region. Switch to compare any other scale.
Canonical unit is the cubic metre. 1 L = 0.001 m³ exact; 1 US gal = 3.785411784 L; 1 Imp gal = 4.54609 L.
Result
0.26417205 US gal
L → US gal
1 L × 0.001 = 0.001 m³; 0.001 ÷ 0.003785411784 = 0.26417205 US gal
- In SI cubic metres0.001 m³
- Factor (from)1 L = 0.001 m³
- Factor (to)1 US gal = 0.003785411784 m³
- How calculated1 L × 0.001 = 0.001 m³; 0.001 ÷ 0.003785411784 = 0.26417205 US gal
- Cross rate1 L = 0.26417205 US gal
Via the cubic metre (SI)
Standards: BIPM SI + US liquid gallon (exact 3.785411784 L) + imperial gallon (exact 4.54609 L). 1 L × 0.001 = 0.001 m³; 0.001 ÷ 0.003785411784 = 0.26417205 US gal
All equivalents
| Unit | Symbol | Value | Factor to m³ |
|---|---|---|---|
| mm³ (cubic millimetre) | mm³ | 1,000,000 | 1 mm³ = 0.000000001 m³ |
| cm³ (cubic centimetre) | cm³ | 1,000 | 1 cm³ = 0.000001 m³ |
| mL (millilitre) | mL | 1,000 | 1 mL = 0.000001 m³ |
| cL (centilitre) | cL | 100 | 1 cL = 0.00001 m³ |
| dL (decilitre) | dL | 10 | 1 dL = 0.0001 m³ |
| L (litre) | L | 1 | 1 L = 0.001 m³ |
| dm³ (cubic decimetre) | dm³ | 1 | 1 dm³ = 0.001 m³ |
| m³ (cubic metre) | m³ | 0.001 | 1 m³ = 1 m³ |
| kL (kilolitre) | kL | 0.001 | 1 kL = 1 m³ |
| in³ (cubic inch) | in³ | 61.023744 | 1 in³ = 0.000016387064 m³ |
| ft³ (cubic foot) | ft³ | 0.03531467 | 1 ft³ = 0.028316846592 m³ |
| yd³ (cubic yard) | yd³ | 0.00130795 | 1 yd³ = 0.764554857984 m³ |
| US tsp (teaspoon) | US tsp | 202.884136 | 1 US tsp = 1/6 US fl oz = 0.00000492892159375 m³ |
| US tbsp (tablespoon) | US tbsp | 67.628045 | 1 US tbsp = 1/2 US fl oz = 0.00001478676478125 m³ |
| US fl oz (fluid ounce) | US fl oz | 33.814023 | 1 US fl oz = 0.0000295735295625 m³ |
| US cup | US cup | 4.226753 | 1 US cup = 0.0002365882365 m³ |
| US pt (pint) | US pt | 2.113376 | 1 US pt = 0.000473176473 m³ |
| US qt (quart) | US qt | 1.056688 | 1 US qt = 0.000946352946 m³ |
| US gal (gallon) | US gal | 0.26417205 | 1 US gal = 0.003785411784 m³ |
| Imp fl oz (fluid ounce) | Imp fl oz | 35.19508 | 1 Imp fl oz = 0.0000284130625 m³ |
| Imp pt (pint) | Imp pt | 1.759754 | 1 Imp pt = 0.00056826125 m³ |
| Imp qt (quart) | Imp qt | 0.87987699 | 1 Imp qt = 0.0011365225 m³ |
| Imp gal (gallon) | Imp gal | 0.21996925 | 1 Imp gal = 0.00454609 m³ |
| bbl (oil barrel) | bbl | 0.00628981 | 1 bbl = 42 US gal = 0.158987294928 m³ |
About this tool
Volume conversion is a two-step scale change through the cubic metre. Multiply the input by its factor to m³, then divide by the target factor: value_m3 = value × factor_from; result = value_m3 ÷ factor_to.
Metric liquid and cubic units are exact SI: 1 mL = 1 cm³ = 10⁻⁶ m³, 1 L = 1 dm³ = 0.001 m³, 1 kL = 1 m³. Cubic imperial length uses the international inch: 1 in³ = (0.0254)³ m³, 1 ft³ = (0.3048)³ m³, 1 yd³ = (0.9144)³ m³. The US liquid gallon is exactly 231 in³ = 3.785411784 L; cups, pints and quarts are exact fractions of that gallon. The imperial gallon is exactly 4.54609 L, with 160 fluid ounces per gallon.
Kitchen spoons are US measures: 1 tbsp = ½ US fl oz ≈ 14.79 mL and 1 tsp = ⅙ US fl oz ≈ 4.93 mL; one oil barrel is exactly 42 US gallons ≈ 158.99 L. To work out a volume from dimensions (cylinder, sphere, box, pool, concrete), use the volume calculator.
Use the all-units table for cooking, fuel, shipping, tanks or school homework. Pair with the length converter and area converter when you need dimensions as well as capacity.
Formula
value_m3 = value × factor_fromresult = value_m3 ÷ factor_to1 L = 0.001 m³ (exact) · 1 mL = 1 cm³ = 1e-6 m³1 US gal = 0.003785411784 m³ (exact = 231 in³)1 Imp gal = 0.00454609 m³ (exact = 4.54609 L)
How it is calculated
- Enter a volume and pick From / To units.
- Convert to cubic metres: value_m3 = value × factor_from (e.g. 1 L = 0.001 m³).
- Convert to the target: result = value_m3 ÷ factor_to.
- Read the step rows for the exact arithmetic of this input.
- Open the equivalents table to see mL, L, m³, US gal, Imp gal, ft³ and more at once.
Questions
How does volume conversion work?
All volumes go through the cubic metre: multiply by the source factor to get m³, then divide by the target factor. Example: 1 L → 1 × 0.001 = 0.001 m³ → 0.001 ÷ 0.003785411784 ≈ 0.264172 US gal.
How many litres in a US gallon?
One US liquid gallon is exactly 231 cubic inches = 3.785411784 litres = 0.003785411784 m³ (NIST / BIPM path).
US gallon vs imperial gallon — what’s the difference?
The US liquid gallon is 3.785411784 L; the imperial gallon (UK) is larger at exactly 4.54609 L. Do not mix US cups/pints with imperial fluid ounces — each system has its own fractions.
Is 1 litre the same as 1 cubic decimetre?
Yes. By SI definition, 1 litre (L) = 1 cubic decimetre (dm³) = 0.001 m³ exactly. Likewise 1 millilitre = 1 cubic centimetre.
Are the results official metrology advice?
No. Calculate This is educational. For legal metrology (trade, fuel pumps, lab work), use your national institute’s guidance and calibrated instruments.