Unit Converters
Volume Unit Converter
Convert between milliliters, liters, gallons (US & UK), cups, pints, quarts, fluid ounces, cubic inches, cubic feet, and more. Free, instant, and fully client-side.
Note: US and UK units differ - e.g. 1 US gallon ≈ 3.785 L, 1 UK gallon ≈ 4.546 L.
US vs UK volume units
The United States and the United Kingdom both use names like "gallon," "pint," and "fluid ounce," but the underlying volumes differ. A US gallon is 3.785411784 liters, while a UK (Imperial) gallon is 4.54609 liters: about 20% larger. This also means a UK pint (568 mL) is larger than a US pint (473 mL). When following a recipe or ordering fuel, always confirm which system is being used.
Common volume conversions
| Value | Result |
|---|---|
| 1 L | 1000 mL |
| 1 L | 0.264172 US gal |
| 1 L | 0.219969 UK gal |
| 1 US gal | 3.78541 L |
| 1 UK gal | 4.54609 L |
| 1 US pt | 473.176 mL |
| 1 UK pt | 568.261 mL |
| 1 US cup | 236.588 mL |
| 1 US fl oz | 29.5735 mL |
| 1 UK fl oz | 28.4131 mL |
| 1 US tbsp | 14.7868 mL |
| 1 US tsp | 4.92892 mL |
| 1 ft³ | 28.3168 L |
| 1 in³ | 16.3871 mL |
How volume conversion works
Every conversion uses liters as the intermediate base unit. The input value is first multiplied by its unit's conversion factor to liters, then divided by the target unit's factor. All factors are exact international definitions or NIST-published values.
Cooking volume reference
| Unit | Milliliters | Relationship |
|---|---|---|
| 1 US teaspoon | 4.929 mL | 3 tsp = 1 tbsp |
| 1 US tablespoon | 14.787 mL | 16 tbsp = 1 cup |
| 1 US fluid ounce | 29.574 mL | 2 tbsp = 1 fl oz |
| 1 US cup | 236.588 mL | 8 fl oz = 1 cup |
| 1 US pint | 473.176 mL | 2 cups = 1 pint |
| 1 US quart | 946.353 mL | 2 pints = 1 quart |
| 1 US gallon | 3,785.41 mL | 4 quarts = 1 gallon |
| 1 UK fluid ounce | 28.413 mL | Slightly smaller than US fl oz |
| 1 UK pint | 568.261 mL | 20 UK fl oz = 1 UK pint |
| 1 UK gallon | 4,546.09 mL | ~20% larger than US gallon |
Dry vs. liquid measure
In the US system, liquid measures and dry measures share the same names but differ in volume. A US dry pint = 551 mL; a US liquid pint = 473 mL. In practice, dry cups and liquid cups are the same volume in US home cooking, but professional baking uses weight (grams) rather than volume for dry ingredients to avoid measurement inconsistency. European recipes almost always specify weight for dry ingredients.
Wine and spirits bottle sizes
| Name | Volume |
|---|---|
| Split / quarter | 187.5 mL |
| Half bottle | 375 mL |
| Standard bottle | 750 mL |
| Magnum | 1.5 L (= 2 bottles) |
| Jeroboam (Champagne) | 3 L (= 4 bottles) |
| US standard spirits shot | 1.5 fl oz (44 mL) |
| UK single spirits measure | 25 mL |
Medical volume units
In clinical contexts, 1 mL = 1 cc (cubic centimetre) exactly, and these terms are used interchangeably on syringes and IV equipment. A medical teaspoon is defined as exactly 5 mL. Syringe volumes are always stated in mL or cc. Never convert medical dosages using household teaspoons, which are typically 4–6 mL depending on the spoon.