Unit Converter
Convert between 100+ units across 11 categories — length, weight, temperature, area, volume, speed, time, digital storage, energy, pressure, and angle. Instant results with formula explanations and full conversion tables.
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Volume Converter
Convert volume between 22 units — millilitres, litres, cubic metres, US teaspoons, tablespoons, cups, pints, quarts, gallons, UK pints, UK gallons, cubic inches, cubic feet, and more. Instant results with formula and full reference table.
Common Conversions
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Explore This Tool in Context
Volume Converter is part of the Conversion Tools collection. If you want a broader view of similar workflows, open the Conversion Tools category page or browse all QuickTools categories.
Common next steps after this tool include Unit Converter, Length Converter and Area Converter.
What Is a Volume Converter?
A volume converter is an online calculation tool that instantly translates a quantity from one volume unit to another. Whether you need to convert litres to US gallons for a road trip, millilitres to fluid ounces for a recipe, or cubic metres to litres for a tank calculation, this tool gives you an exact, conversion-table-quality answer in milliseconds.
It covers 22 units across three measurement systems: the Metric (SI) system (mm³, cm³, mL, cL, dL, L, m³, km³), US Customary (teaspoon, tablespoon, fluid ounce, cup, pint, quart, gallon), and the Imperial / UK system plus cubic units (cubic inch, cubic foot, cubic yard, UK fluid ounce, UK pint, UK quart, UK gallon). All values are computed from internationally-defined exact conversion factors, so you can rely on the results for cooking, science, engineering, and everyday tasks.
How to Use the Volume Converter
- Pick a quick pair — tap one of the eight common conversion chips (e.g., L → gal (US)) to pre-fill both unit selectors instantly.
- Select the From unit from the grouped dropdown — units are sorted into Metric (SI), US Customary, and Imperial (UK) / Cubic categories.
- Enter your value in the input field. Any positive or negative number is accepted, including decimals.
- Select the To unit in the right dropdown. The result appears immediately in the blue panel.
- Use the ⇄ swap button to reverse the direction and convert back — the current result becomes the new input.
- Browse all 22 conversions in the table below. Use the group filter tabs (All / Metric / US / Imperial) to focus on a specific system, or click any row to instantly set that unit as your target.
Common Volume Conversion Examples
| From | To | Result |
|---|---|---|
| 1 Litre (L) | US Gallons | ≈ 0.2642 gal |
| 1 US Gallon | Litres | ≈ 3.7854 L |
| 1 mL | US Fluid Ounces | ≈ 0.0338 fl oz |
| 1 US Fluid Ounce | Millilitres | ≈ 29.574 mL |
| 1 US Cup | Millilitres | ≈ 236.59 mL |
| 1 Litre | UK Pints | ≈ 1.7598 pt (UK) |
| 1 UK Gallon | Litres | ≈ 4.5461 L |
| 1 m³ | Litres | 1000 L |
| 1 Cubic Foot | Litres | ≈ 28.317 L |
| 1 Cubic Inch | Millilitres | ≈ 16.387 mL |
| 1 US Tablespoon | Millilitres | ≈ 14.787 mL |
| 1 US Teaspoon | Millilitres | ≈ 4.929 mL |
How the Conversion Works
Every volume unit is stored as an exact multiplier of the litre (the SI base unit for volume). To convert from unit A to unit B, the engine uses the ratio formula:
result = value × factor(A) ÷ factor(B)
For example, to convert 5 litres → US gallons: the litre factor is 1 and the US gallon factor is 3.785411784, so result = 5 × 1 ÷ 3.785411784 = 1.32086 gal.
All factors are based on the exact international definitions — for example, 1 US gallon = 231 in³ exactly, 1 in³ = 16.387064 mL exactly. This means every result is accurate to the full precision of IEEE 754 double-precision floating point arithmetic.
Volume Unit Reference
Metric (SI)
| mm³ | Cubic Millimetre | 0.000001 L |
| cm³ | Cubic Centimetre | 0.001 L |
| mL | Millilitre | 0.001 L |
| cL | Centilitre | 0.01 L |
| dL | Decilitre | 0.1 L |
| L | Litre | 1 L (base) |
| m³ | Cubic Metre | 1000 L |
| km³ | Cubic Kilometre | 1 × 10¹² L |
US Customary
| tsp | Teaspoon | ≈ 4.929 mL |
| tbsp | Tablespoon | ≈ 14.787 mL |
| fl oz | Fluid Ounce | ≈ 29.574 mL |
| cup | Cup | ≈ 236.588 mL |
| pt | Pint | ≈ 473.176 mL |
| qt | Quart | ≈ 946.353 mL |
| gal | Gallon | ≈ 3785.41 mL |
Imperial (UK) & Cubic
| in³ | Cubic Inch | ≈ 16.387 mL |
| ft³ | Cubic Foot | ≈ 28316.8 mL |
| yd³ | Cubic Yard | ≈ 764555 mL |
| fl oz UK | UK Fluid Oz | ≈ 28.413 mL |
| pt UK | UK Pint | ≈ 568.261 mL |
| qt UK | UK Quart | ≈ 1136.52 mL |
| gal UK | UK Gallon | ≈ 4546.09 mL |
Frequently Asked Questions
How many litres are in a US gallon?
1 US gallon = 3.785411784 litres (exact, by international definition). So 2 gallons = 7.571 L, 5 gallons = 18.927 L.
What is the difference between a US gallon and a UK gallon?
A US gallon is 3.785 L while a UK (imperial) gallon is 4.546 L — about 20% larger. This difference is why fuel economy figures differ significantly between US mpg and UK mpg.
How many ml are in a US fluid ounce?
1 US fluid ounce = 29.5735 mL. Note that a UK fluid ounce is slightly different: 28.4131 mL.
How many cups are in a quart?
There are exactly 4 US cups in 1 US quart. A cup is 236.588 mL; a quart is 946.353 mL.
How many mL in a tablespoon?
1 US tablespoon = 14.7868 mL (= 3 teaspoons = ½ fl oz). Australian tablespoons are 20 mL.
What is a pint in litres?
It depends on the system. 1 US pint = 0.473 L; 1 UK pint = 0.568 L. Always check which system is intended, especially for beer and milk volumes.
How do I convert cubic metres to litres?
Multiply by 1000. 1 m³ = 1000 L exactly, because a litre is defined as 1 dm³ (one cubic decimetre), and there are 1000 dm³ in 1 m³.
Is cm³ the same as mL?
Yes — 1 cm³ = 1 mL exactly. The cubic centimetre (also written cc) and the millilitre are the same volume, and the terms are used interchangeably in medicine and science.
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