What is 8 cups to gallons?
Type a value in either box, and the answer shows it in the other unit as you type.
- Gallons (gal)
- 0.5
8 cups = 0.5 gal.
Gallons (gal): 0.5. 8 cups = 0.5 gal.
Gallons (gal) by cups (cup)
How to calculate
Converts cups (cup) to gallons (gal) and back, with the exact unit definitions.
Example with the default inputs (Cups (cup) 8): 8 cups = 0.5 gal.
Formula: gal = cup × 0.0625 (the same as cup ÷ 16)
- 1 cup = 0.0625 gallons, 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.
- The answer shows at most 6 decimal places; the calculation keeps full precision.
Worked examples
Each example is checked against the calculator on every build.
- Cups (cup) 1 gives Gallons (gal) 0.0625.Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8
- Cups (cup) 16 gives Gallons (gal) 1.Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8
- Gallons (gal) 1 gives Cups (cup) 16.Source: Exact unit definitions in NIST SP 811 (2008), Appendix B.8
Other questions people ask
What is 8 cups in gallons?
8 cups is 0.5 gal. The formula is gal = cup × 0.0625 (the same as cup ÷ 16).
How many gallons are in a cup?
1 cup is 0.0625 gallons, from the exact unit definitions (NIST SP 811).
How do I convert cups to gallons?
Multiply by 0.0625: gal = cup × 0.0625 (the same as cup ÷ 16). For example, 8 cups × 0.0625 = 0.5 gal.
How do I convert gallons back to cups?
Multiply by 16, or type the gallons into the second box and the converter works it out. 1 gallon is 16 cups.