Convert US Gallon to Metric Cup
Convert us gallons to metric cups instantly. 1 us gallon = 15.141647136 metric cup — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Metric Cup to US Gallon converter for the reverse conversion.
Units explained
US Gallon
The US liquid gallon is defined as exactly 231 cubic inches (3.785411784 liters).
Based on the English wine gallon of 231 cubic inches, retained by the US after 1824.
The primary US unit for fuel, milk and large beverage containers.
English wine gallon; US since 1824.
Metric Cup
A metric cup is exactly 250 milliliters.
Adopted with metrication in Australia, New Zealand and other countries.
Standard cooking cup in metric-recipe countries.
Metrication, 20th c.
US Gallon to Metric Cup conversion formula
The relationship between us gallons and metric cups:
To convert us gallons to metric cups, multiply the value in us gallons by 15.141647136. To reverse, multiply metric cups by 0.0660430131.
How to use this converter
Type a value into the calculator. The result in metric cups updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Metric Cup to US Gallon converter for the reverse direction.
Step-by-step: convert us gallons to metric cups
- Write down the value in us gallons (gal).
- Multiply that value by the factor 15.141647136.
- The product is the equivalent value in metric cups (cup).
- To reverse, multiply the metric cup value by 0.0660430131.
Worked examples
Example 1 — Convert 1 gal to cup:
1 × 15.141647136 = 15.141647136 cup
Example 2 — Convert 100 gal to cup:
100 × 15.141647136 = 1514.1647136 cup
Real-world example — Adjacent metric sub-units
One us gallon equals 1,000 metric cups. Engineers move between these scales constantly: PCB feature sizes in the larger unit, wire-bond diameters in the smaller.
1 gal × 15.141647136 = 15.141647136 cup
Real-world example — Adjacent small-scale precision
One us gallon equals 1,000 metric cups — the standard sub-millimeter precision conversion that materials engineers use whenever they switch between bulk material thickness specs (larger unit) and surface-finish characteristics (smaller unit).
1 gal × 15.141647136 = 15.141647136 cup
US Gallon to Metric Cup conversion table
Standard reference values for converting us gallons to metric cups:
| US Gallon [gal] | Metric Cup [cup] |
|---|---|
| 0.01 | 0.1514164714 |
| 0.1 | 1.5141647136 |
| 1 | 15.141647136 |
| 2 | 30.283294272 |
| 3 | 45.424941408 |
| 4 | 60.566588544 |
| 5 | 75.70823568 |
| 10 | 151.41647136 |
| 20 | 302.83294272 |
| 30 | 454.24941408 |
| 40 | 605.66588544 |
| 50 | 757.0823568 |
| 100 | 1514.1647136 |
| 500 | 7570.823568 |
| 1000 | 15141.647136 |
Frequently asked questions
How many metric cups is 1 us gallon?
How do I convert us gallons to metric cups?
How do I convert metric cups back to us gallons?
How many metric cups is 100 us gallons?
Popular volume unit conversions
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Metric / SI (15 units)
US Customary (Liquid) (14 units)
US Customary (Dry) (5 units)
Imperial (UK) (14 units)
Cubic (length-derived) (4 units)
Cooking / Culinary (5 units)
Sources & references
Conversion factor (1 gal = 15.141647136 cup) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.