What is 3 gallons to cups?
Type a value in either box, and the answer shows it in the other unit as you type.
- Cups (cup)
- 48
3 gal = 48 cups.
Cups (cup): 48. 3 gal = 48 cups.
Cups (cup) by gallons (gal)
How to calculate
Converts gallons (gal) to cups (cup) and back, with the exact unit definitions.
Example with the default inputs (Gallons (gal) 3): 3 gal = 48 cups.
Formula: cup = gal × 16
- 1 gallon = 16 cups, from the exact definitions in NIST SP 811.
- Cups, ounces, tablespoons, teaspoons, pints, quarts, and gallons are US customary units: 1 US cup is 8 US fluid ounces.
- Exact on the typed decimals: at most 6 decimal places (6 significant digits below 0.0001), rounded half up; an answer of 1 billion or more shows at most 15 significant digits.
Worked examples
Each example is checked against the calculator on every build.
- Gallons (gal) 1 gives Cups (cup) 16.Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8
- Gallons (gal) 3 gives Cups (cup) 48.Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8
- Cups (cup) 48 gives Gallons (gal) 3.Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8
Other questions people ask
What is 3 gallons in cups?
3 gal is 48 cups. The formula is cup = gal × 16.
How many cups are in a gallon?
1 gallon is 16 cups, from the exact unit definitions (NIST SP 811).
How do I convert gallons to cups?
Multiply by 16: cup = gal × 16. For example, 3 gal × 16 = 48 cups.
How do I convert cups back to gallons?
Multiply by 0.0625, or type the cups into the second box and the converter works it out. 1 cup is 0.0625 gallons.