Convert volume units — liters, gallons, cups, milliliters, cubic meters, barrels and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 cup | 6.25e-05 gal | |
| 0.01 cup | 0.000625 gal | |
| 0.1 cup | 0.00625 gal | |
| 1 cup | 0.0625 gal | |
| 5 cup | 0.3125 gal | |
| 10 cup | 0.625 gal | |
| 50 cup | 3.125 gal | |
| 100 cup | 6.25 gal | |
| 1000 cup | 62.5 gal |
Common us cup values converted to us gallon — factor: 1 cup = 0.0625 gal
| US Cup (cup) | US Gallon (gal) | Context |
|---|---|---|
| 0.0625 cup | 0.003906 gal | Tablespoon |
| 0.125 cup | 0.007812 gal | Eighth cup |
| 0.25 cup | 0.01562 gal | Quarter cup |
| 0.333 cup | 0.02081 gal | Third cup |
| 0.5 cup | 0.03125 gal | Half cup |
| 1 cup | 0.0625 gal | One cup |
| 2 cup | 0.125 gal | One pint |
| 4 cup | 0.25 gal | One quart |
| 8 cup | 0.5 gal | Half gallon |
| 16 cup | 1 gal | One gallon |
| 32 cup | 2 gal | 2 gallons |
| 64 cup | 4 gal | 4 gallons |
| 128 cup | 8 gal | 8 gallons |
| 256 cup | 16 gal | Large drum |
| 512 cup | 32 gal | Large drum |
Converting us cup to us gallon comes up frequently in cooking, chemistry, medicine, and engineering. A recipe written in metric units may need to be adapted for a kitchen using us gallon, or a laboratory protocol may specify volumes in us cup that need to be measured with equipment calibrated in us gallon.
In everyday use, knowing that 5 cup = 0.3125 gal and 10 cup = 0.625 gal covers most common situations. For bulk calculations, 100 cup = 6.25 gal is a useful anchor. The reverse conversion — us gallon back to us cup — uses the factor 16, so 1 gal = 16 cup.
All conversions use the internationally recognized factor of exactly 1 cup = 0.0625 gal. Calculations are performed in IEEE 754 double-precision floating point, giving accuracy to at least 8 significant figures — more than sufficient for any practical application.
Formula: US Gallon = US Cup × 0.062499967
Multiply any us cup value by 0.062499967 to get us gallon. One us cup equals 0.062499967 gal.
Reverse: US Cup = US Gallon × 16.000008
Cups ÷ 16 = US gallons. Exact.
4 cups = 1 qt = ¼ gal. 16 cups = 1 gal.
Gallons × 16 = cups.
Follows American recipes using cups for flour, sugar, milk, and butter.
Tests and standardizes recipes in cup measurements before international publication.
Uses cup portions as standardized serving-size references for dietary counseling.
Teaches beginner cooks using cups as intuitive, equipment-free measuring tools.
Converts cup-based recipes to liter or kilogram quantities for industrial production.
Converts US cup measurements to metric mL when cooking American recipes abroad.
The US customary cup is defined as exactly 8 US fluid ounces, or 236.588 mL. It was standardized by Fannie Farmer in her 1896 cookbook The Boston Cooking-School Cook Book.
The cup is the backbone of US baking: nearly every American recipe uses cup measurements for flour, sugar, butter, and liquids. Standard sets include 1 cup, ½ cup, ⅓ cup, and ¼ cup.
Interesting fact: Australia uses a metric cup of 250 mL, slightly larger than the US cup, which can cause recipe confusion in international cooking.
The US liquid gallon is defined as exactly 231 cubic inches, or 3.785411784 liters. It traces its origins to the Queen Anne wine gallon of 1707, which American colonies adopted.
The US gallon differs from the UK Imperial gallon by about 16.5%. This matters for fuel economy: a US MPG figure is lower than the equivalent UK MPG for the same car.
Interesting fact: The United States, Liberia, and Myanmar are the only countries using the US gallon as a primary everyday volume unit.