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Units to Go · Volume conversion

Volume Converter: Gallons, Cups, Fluid Ounces & More

Convert cooking and liquid measurements between US customary and metric volume units. This page distinguishes fluid ounces (volume) from ounces (weight).

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Conversions use standard unit definitions. Results use the selected number of decimal places; some exact conversions produce repeating decimals.

Gallons to liters

One US liquid gallon equals about 3.785411784 liters.

US gallons (gal)Liters (L)
13.785412
27.570824
518.927059
1037.854118

US cups to milliliters

US cupsMilliliters (mL)
0.5118.294
1236.588
2473.176
4946.353

US fluid ounces to gallons

There are 128 US fluid ounces in one US liquid gallon.

US fluid ounces (fl oz)US gallons (gal)
10.0078125
80.0625
160.125
320.25
1281
A fluid ounce measures volume. A weight ounce measures mass; the two are not interchangeable without knowing the liquid or material.

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