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Volume Converter
Convert between liters, gallons, milliliters, cups, fluid ounces, pints, quarts, and cubic meters instantly. Perfect for cooking, chemistry, fuel economy, and international recipe conversion.
Conversion Formula
1 liter = 0.264172 US gallons | 1 cup = 236.588 mL | 1 fl oz = 29.5735 mL | 1 gallon = 3.78541 L
Volume Unit Conversion Guide
Volume conversion is essential in cooking (US cups vs metric milliliters), chemistry (liters vs cubic centimeters), automotive (liters vs gallons for fuel), and everyday life (fluid ounces on product labels). The two main systems — metric and US customary — use very different volume units.
Liters to Gallons
1 US gallon = 3.78541 liters. The US gallon differs from the UK/Imperial gallon: 1 UK gallon = 4.54609 liters. A standard car fuel tank of 50 liters = 13.2 US gallons. Gas mileage in the US uses miles per gallon (mpg), while Europe uses liters per 100 km (L/100km).
Cups to Milliliters for Cooking
1 US cup = 236.588 mL. Most cooking recipes in the US use cups, tablespoons, and teaspoons, while European and Asian recipes use grams and milliliters. Key conversions for cooking: 1 tablespoon = 14.787 mL, 1 teaspoon = 4.929 mL, 1 cup = 16 tablespoons = 48 teaspoons.
Unit
Liters
US Fluid Oz
1 US Gallon
3.78541
128
1 US Quart
0.946353
32
1 US Pint
0.473176
16
1 US Cup
0.236588
8
1 US Fl. Oz
0.0295735
1
1 Tablespoon
0.0147868
0.5
Frequently Asked Questions
1 US gallon = 3.78541 liters. The UK/Imperial gallon is larger: 1 UK gallon = 4.54609 liters. To convert gallons to liters, multiply by 3.78541. To convert liters to gallons, divide by 3.78541.
1 US cup = 236.588 milliliters (approximately 237 mL). This is the standard US legal cup used in nutrition labeling. The metric cup (used in Australia and Canada) is exactly 250 mL.
1 liter = 33.814 US fluid ounces. A standard 500mL water bottle = 16.907 fl oz. A 2-liter bottle = 67.628 fl oz. Note: UK fluid ounces are slightly different (1 liter = 35.195 UK fl oz).
The US gallon is 3.785 liters while the UK (Imperial) gallon is 4.546 liters — about 20% larger. This difference matters significantly for fuel economy: a UK car rated at 40 mpg is not the same as a US car rated at 40 mpg.
There are 16 cups in 1 US gallon. Other relationships: 4 quarts = 8 pints = 16 cups = 128 fluid ounces = 1 gallon = 3.785 liters.
Divide milliliters by 236.588 to get US cups. For example: 500 mL ÷ 236.588 = 2.11 cups. Alternatively: 500 mL ÷ 250 = 2 metric cups (used in Australian recipes).