Convert US Cup to US Gallon
Convert us cups to us gallons instantly. 1 us cup = 0.0625 us gallon — use the live calculator, the exact formula, a conversion table and worked examples. Also check the US Gallon to US Cup converter for the reverse conversion.
Units explained
US Cup
A US customary cup is one sixteenth of a US gallon (236.588 mL).
Standardized for American cooking; distinct from the 240 mL US legal cup and the 250 mL metric cup.
The standard US cooking-volume unit in recipes.
US customary cooking measure.
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.
US Cup to US Gallon conversion formula
The relationship between us cups and us gallons:
To convert us cups to us gallons, multiply the value in us cups by 0.0625. To reverse, multiply us gallons by 16.
How to use this converter
Type a value into the calculator. The result in us gallons updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the US Gallon to US Cup converter for the reverse direction.
Step-by-step: convert us cups to us gallons
- Write down the value in us cups (cup).
- Multiply that value by the factor 0.0625.
- The product is the equivalent value in us gallons (gal).
- To reverse, multiply the us gallon value by 16.
Worked examples
Example 1 — Convert 1 cup to gal:
1 × 0.0625 = 0.0625 gal
Example 2 — Convert 100 cup to gal:
100 × 0.0625 = 6.25 gal
Real-world example — Packaging gauge
A 4-us cup plastic bag thickness is a common spec for grocery and freezer bags. Converting from us cups to us gallons is what packaging buyers do whenever they bridge US and metric supplier quotes.
4 cup × 0.0625 = 0.25 gal
Real-world example — Plastic film and laminate thickness
A 500-us cup sheet is a typical spec for ID-card laminates and film overlays. Converting to us gallons aligns the value with the unit most CAD systems and material datasheets prefer.
500 cup × 0.0625 = 31.25 gal
US Cup to US Gallon conversion table
Standard reference values for converting us cups to us gallons:
| US Cup [cup] | US Gallon [gal] |
|---|---|
| 0.01 | 0.000625 |
| 0.1 | 0.00625 |
| 1 | 0.0625 |
| 2 | 0.125 |
| 3 | 0.1875 |
| 4 | 0.25 |
| 5 | 0.3125 |
| 10 | 0.625 |
| 20 | 1.25 |
| 30 | 1.875 |
| 40 | 2.5 |
| 50 | 3.125 |
| 100 | 6.25 |
| 500 | 31.25 |
| 1000 | 62.5 |
Frequently asked questions
How many us gallons is 1 us cup?
How do I convert us cups to us gallons?
How do I convert us gallons back to us cups?
How many us gallons is 100 us cups?
Popular volume unit conversions
Convert US Cup to other volume units
Show all US Cup conversions
Metric / SI (8 units)
US Customary (Liquid) (7 units)
Imperial (UK) (4 units)
Cubic (length-derived) (3 units)
Cooking / Culinary (3 units)
Sources & references
Conversion factor (1 cup = 0.0625 gal) 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 Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.