Skip to content
Free calculators and practical guides for smarter home projects.
DIY Cost Tools

DIY Cost Tools

Volume Converter

Conversion Calculator

Volume Converter

Convert U.S. teaspoons, tablespoons, fluid ounces, cups, pints, quarts, gallons, milliliters, liters, cubic inches, and cubic feet. Results update together for quick project and household comparisons.

Graduated measuring jug marked in milliliters
Photo by Mark Owen Wilkinson Hughes on Unsplash.

Convert volume

U.S. teaspoons768 tsp
U.S. tablespoons256 tbsp
U.S. fluid ounces128 fl oz
U.S. cups16 cups
U.S. pints8 pt
U.S. quarts4 qt
U.S. gallons1 gal
Milliliters3,785.411784 mL
Liters3.785412 L
Cubic inches231 cu in
Cubic feet0.133681 cu ft

U.S. customary liquid units are used. Imperial gallons and Imperial fluid ounces are different units.

How this volume converter works

The calculator converts the entered amount to liters and uses that base value to produce each result. It covers both liquid measures commonly used in the United States and three-dimensional units useful for containers, fill quantities, and project planning.

Common U.S. volume relationships

  • 3 teaspoons = 1 tablespoon
  • 2 tablespoons = 1 U.S. fluid ounce
  • 8 U.S. fluid ounces = 1 U.S. cup
  • 2 cups = 1 pint
  • 2 pints = 1 quart
  • 4 quarts = 1 U.S. gallon
  • 1 U.S. gallon = 3.785411784 liters = 231 cubic inches

Worked example: one U.S. gallon

One U.S. liquid gallon equals 3.785411784 liters. It also equals 4 quarts, 8 pints, 16 cups, 128 U.S. fluid ounces, 256 tablespoons, 768 teaspoons, 231 cubic inches, or approximately 0.133681 cubic foot.

U.S. units versus Imperial units

This tool uses U.S. customary liquid measures. An Imperial gallon is larger than a U.S. gallon, and an Imperial fluid ounce is different from a U.S. fluid ounce. Confirm which system appears on a plan, product label, recipe, or specification before ordering materials.

Volume is not weight

A cup, liter, or cubic foot describes space, not mass. The weight of that volume depends on the material's density. One cup of water does not weigh the same as one cup of sand, oil, or dry cement. For dry ingredients, use a material-specific weight conversion when accuracy matters.

Frequently asked questions

How many liters are in a U.S. gallon?

One U.S. liquid gallon equals exactly 3.785411784 liters.

How many cubic inches are in a gallon?

One U.S. liquid gallon contains exactly 231 cubic inches.

Can I use this for cooking?

Yes for U.S. liquid-volume conversions, but check the measurement system used by the recipe. The calculator does not convert volume to grams because that requires the ingredient's density.

Related calculators

Sources and review

Conversions use the SI reference relationships published by the National Institute of Standards and Technology. Calculator logic and examples were reviewed by the DIY Cost Tools editorial team on September 22, 2026.