Volume Converter

US Gallon: 1 US gallon equals approximately 3.785 liters (3.78541 L exactly).
UK (Imperial) Gallon: 1 UK gallon equals approximately 4.546 liters (4.54609 L exactly).
The UK gallon is about 20% larger than the US gallon. This is why it's important to know which gallon is being referenced — especially when following recipes or comparing fuel economy between countries.

The US gallon is defined as exactly 231 cubic inches, which equals 3.78541 liters. The UK (Imperial) gallon is defined as the volume of 10 pounds of water at 62°F, which equals 4.54609 liters (or 277.42 cubic inches).

The UK gallon is approximately 20% larger than the US gallon. This distinction is crucial for international recipes, fuel purchases, and industrial measurements.

There are exactly 4 US cups in 1 US liquid quart. This is a standard US customary measurement.

Quick reference:
• 1 quart = 4 cups = 2 pints = 32 fluid ounces ≈ 946.4 mL
• 1 cup = 8 fluid ounces = 16 tablespoons = 48 teaspoons ≈ 236.6 mL

Multiply the number of cups by 236.588 to get milliliters.
Formula: mL = cups × 236.588

Common conversions:
• ¼ cup ≈ 59 mL
• ½ cup ≈ 118 mL
• 1 cup ≈ 237 mL
• 2 cups ≈ 473 mL
• 4 cups (1 quart) ≈ 946 mL

There are exactly 16 US tablespoons in 1 US cup. This is a fundamental kitchen conversion used in cooking and baking.

Kitchen hierarchy:
• 1 cup = 16 tablespoons
• 1 tablespoon = 3 teaspoons = ½ fluid ounce ≈ 14.8 mL
• 1 teaspoon = ⅓ tablespoon ≈ 4.93 mL

This makes scaling recipes up or down much easier — simply multiply or divide by 16 for cup-to-tablespoon conversions.

1 US fluid ounce = 29.5735 milliliters (approximately 29.6 mL).
1 UK fluid ounce = 28.4131 milliliters (approximately 28.4 mL).

The US fluid ounce is about 4% larger than the UK fluid ounce. For most cooking purposes, rounding to 30 mL per US fluid ounce is perfectly acceptable and makes mental math easier.

There are approximately 7.481 US gallons in 1 cubic foot.

This conversion is commonly used in:

• Aquarium and fish tank volume calculations
• Water meter readings (utilities often bill in cubic feet)
• Swimming pool volume estimation
• Rainwater harvesting calculations

Essential kitchen conversions to memorize:
• 3 teaspoons = 1 tablespoon
• 16 tablespoons = 1 cup
• 2 cups = 1 pint
• 4 cups = 1 quart
• 4 quarts = 1 gallon
• 1 cup ≈ 237 mL
• 1 fluid ounce ≈ 30 mL (rounded)

For international recipes, remember that a US cup (237 mL) differs from a metric cup (250 mL) used in Australia and New Zealand. Our tool uses US customary units by default.