GPH to GPM Converter

Convert gallons per hour (GPH) to gallons per minute (GPM). Divide by 60, the number of minutes in an hour. Aquarium pumps, fuel pumps, well yields and drip systems are rated in GPH; most water pumps, flow meters and plumbing fixtures use GPM, so this is the conversion for comparing the two.

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GPH to GPM conversion result

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How It Works

GPH and GPM share the same volume unit and differ only in the time base. Dividing a per-hour figure by 60 gives the per-minute figure exactly, with no rounding and no dependence on whether the gallon is US or Imperial.

GPH to GPM Formula

GPM = GPH ÷ 60

One gallon per hour equals 0.0166667 gallons per minute. Going the other way, one gallon per minute equals 60 gallons per hour.

Worked Example

Converting 600 GPH:

600 ÷ 60 = 10 GPM

GPH to GPM Conversion Table

GPH GPM
1 GPH 0.0166667 GPM
10 GPH 0.166667 GPM
30 GPH 0.5 GPM
60 GPH 1 GPM
100 GPH 1.66667 GPM
250 GPH 4.16667 GPM
500 GPH 8.33333 GPM
1000 GPH 16.6667 GPM
5000 GPH 83.3333 GPM

Going the other way? Use the GPM to GPH converter. For any other unit pair, the full flow rate converter handles every supported unit.

FAQ

Common questions about converting gallons per hour to gallons per minute.

Frequently Asked Questions

How do I convert GPH to GPM?

Divide by 60. For example, 600 GPH / 60 = 10 GPM. Equivalently, multiply by 0.0166667.

How many GPM is 100 GPH?

100 GPH is 1.66667 GPM, about one and two-thirds gallons a minute. That is roughly the flow of a low-flow bathroom tap.

What is 300 GPH in GPM?

300 GPH is 5 GPM. A 300 GPH aquarium pump turns over a 75-gallon tank four times an hour.

Does it matter whether the gallons are US or Imperial?

No, the gallon cancels out. It only matters if you then convert to litres: 1 US GPM = 3.78541 L/min and 1 Imperial GPM = 4.54609 L/min.

How do I convert GPH to litres per hour?

Multiply US GPH by 3.78541. 100 GPH is 378.5 L/h. For a per-minute figure in litres, divide by 60 first and then use the GPM to LPM converter.

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