A US liquid gallon is exactly 3.785411784 liters.
Gallons to Metric cups Converter — gal to metric cup
Convert Gallon (gal) to Metric cup (metric cup) using the exact conversion factor (1 gallon = 15.14164714 metric cup). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Gallons to Metric cups converter
Converter
Volume Converter
Convert metric, US customary, imperial, cooking, dry, and industrial volume units.
Context values
Some unit families need one extra value for a physically accurate result.
A metric cup is 250 milliliters.
Result = input x 0.003785411784 / 0.00025.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Gallons to Metric cups
Gallon and Metric cup appear side by side at fuel pumps and on beverage labels, since the US measures liquids in gallons while most of the world uses liters. Gallon is typically associated with united States (fuel, beverage, and liquid measurement), while Metric cup is typically associated with australia, New Zealand, United Kingdom, Canada (recipes and cooking measurement).
Formula
metric cups = gallons × 15.141647136
This factor comes from each unit's defined relationship to the category's base unit: 1 gallon equals 0.003785411784 base units, and 1 metric cup equals 0.00025 base units, so dividing one by the other gives the direct gallon-to-metric cup factor of 15.141647136.
Simple example
1 gal × 15.14164714 = 15.14164714 metric cup
1 gallon = 15.14164714 metric cups.
Real-world example
10 gal × 15.14164714 = 151.4164714 metric cup
10 gallons = 151.4164714 metric cups.
Conversion table
| Gallon (gal) | Metric cup (metric cup) |
|---|---|
| 1 gal | 15.14164714 metric cup |
| 5 gal | 75.70823568 metric cup |
| 10 gal | 151.4164714 metric cup |
| 25 gal | 378.5411784 metric cup |
| 50 gal | 757.0823568 metric cup |
| 100 gal | 1,514.164714 metric cup |
Reverse conversion: Metric cup to Gallon
15.14164714 metric cup × 0.06604301309 = 1 gal
15.14164714 metric cups = 1 gallons.
gallons = metric cups × 0.0660430130895
For a page dedicated to this direction, see Metric cup to Gallon.
Gallon vs. Metric cup
| Aspect | Gallon | Metric cup |
|---|---|---|
| Family | US customary unit | Non-SI unit (culinary, metric countries) |
| Typical use | Fuel pump and vehicle fuel-economy measurement in the US | Recipe and cooking measurement in metric-using English-speaking countries |
| Where it's used | United States (fuel, beverage, and liquid measurement) | Australia, New Zealand, United Kingdom, Canada (recipes and cooking measurement) |
Understanding the Gallon
Gallon (gal) measures volume. The US liquid gallon is defined as exactly 231 cubic inches, equal to 3.785411784 liters. It is classified as a US customary unit.
Where it's used: United States (fuel, beverage, and liquid measurement)
US gallon vs. imperial gallon. The US liquid gallon (3.785411784 L) and the British imperial gallon (4.54609 L) are different units with the same name; always confirm which one a source is using.
Uses of the Gallon today
- Fuel pump and vehicle fuel-economy measurement in the US
- Beverage and liquid product packaging in the US
- Cooking and recipe measurement in US customary units
History of the Gallon
The US gallon descends from the English wine gallon of 231 cubic inches, a standard used for measuring wine in medieval and early modern England, which the American colonies inherited and retained even after England moved to a different imperial gallon in 1824.
England's 1824 Weights and Measures Act replaced the old wine gallon with a new imperial gallon (based on 10 pounds of water), but the US kept the older 231-cubic-inch definition — which is why the US gallon (3.785 L) and the imperial gallon (4.546 L) differ by about 20% today.
Historical origin. Gallon was not the invention of a single named person; it developed through the process described above.
Understanding the Metric cup
Metric cup (metric cup) measures volume. The metric cup used in Australia, New Zealand, the UK, and Canada is defined as exactly 250 milliliters. It is classified as a Non-SI unit (culinary, metric countries).
Where it's used: Australia, New Zealand, United Kingdom, Canada (recipes and cooking measurement)
Metric cup vs. US cup. The metric cup (250 mL) is about 4% larger than the US cooking cup (240 mL) — small for most recipes, but worth checking when following a recipe from a different country.
Uses of the Metric cup today
- Recipe and cooking measurement in metric-using English-speaking countries
- Baking and portion measurement
History of the Metric cup
As Commonwealth countries metricated through the 20th century, cookbook publishers and standards bodies adopted a round 250 mL 'metric cup' so recipes could use a convenient, easily-scaled volume rather than the US's 240 mL or older imperial teacup conventions.
Historical origin. Metric cup was not the invention of a single named person; it developed through the process described above.
Gallon — sources
- NIST Handbook 44, Appendix C — General tables of units of measurement, including the US gallon definition.
Metric cup — sources
- National Measurement Institute (Australia) — Kitchen measures — Documents the 250 mL metric cup standard.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many metric cups are in 1 gallon?
1 gallon equals 15.14164714 metric cups, using the exact defined conversion factor rather than an estimate.
How do I convert gallon to metric cup?
Multiply the gallon value by 15.14164714. The converter above does this instantly to whatever precision you set.
How do I convert metric cup back to gallon?
Use the reverse factor: 1 metric cup equals 0.0660430131 gallons. You can also use the swap control in the converter above to flip the direction instantly.
What is a gallon?
Gallon (gal) measures volume. The US liquid gallon is defined as exactly 231 cubic inches, equal to 3.785411784 liters. It is classified as a US customary unit.
What is a metric cup?
Metric cup (metric cup) measures volume. The metric cup used in Australia, New Zealand, the UK, and Canada is defined as exactly 250 milliliters. It is classified as a Non-SI unit (culinary, metric countries).
Is the gallon to metric cup conversion exact?
Yes. The metric cup used in Australia, New Zealand, the UK, and Canada is defined as exactly 250 milliliters. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
What is the difference between us gallon vs. imperial gallon?
The US liquid gallon (3.785411784 L) and the British imperial gallon (4.54609 L) are different units with the same name; always confirm which one a source is using.
Where is the gallon still used today?
United States (fuel, beverage, and liquid measurement)