To convert gallons per minute to gallons per hour, multiply by 60.
The calculation uses 1 GPM = 60 GPH. Results are displayed to at most 10 significant digits. Definitions can be exact while a displayed decimal is rounded. Match the displayed precision to your original measurement.
The formula
value in GPH = value in GPM × 60
GPM- Input unit: gallons per minute
GPH- Output unit: gallons per hour
How to use this calculator
- Enter a value in GPM.
- Multiply by the stored conversion factor.
- Read the result in GPH; divide by the same factor to convert back.
Worked examples
Worked conversion
1 GPM × 60 ≈ 60 GPH.
Reverse conversion
60 GPH ÷ 60 ≈ 1 GPM. Rounding intermediate values can change the last displayed digit.
Frequently asked questions
What factor does this converter use?
It uses 60 GPH per GPM.
Why can another converter show a slightly different answer?
Check the unit convention first (such as US versus Imperial or decimal versus binary), then compare rounding. Measurement uncertainty is separate from the unit conversion.
GPM to GPH table
| GPM | GPH (rounded) |
|---|---|
| 0 | 0 |
| 1 | 60 |
| 2 | 120 |
| 5 | 300 |
| 10 | 600 |
| 100 | 6000 |
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