Cubic metres per hour to US gallons per minute Converter m³/h → GPM

1 cubic metre per hour (m³/h) = 4.402867539 US gallons per minute (GPM). Type a value below — the conversion happens instantly, entirely on your device.

From

1 m³/h = 4.402867539 GPM

Precision

10 cubic metres per hour = 44.028675 US gallons per minute

10 × 4.40287 = 44.028675

1 m³/h equals 4.40287 GPM, so multiplying by 4.40287 converts the value. The result describes the exact same quantity — only the measuring stick changes.

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How to convert cubic metres per hour to US gallons per minute

US gallons per minute = cubic metres per hour × 4.402867539 — multiply the cubic metre per hour value by 4.40287.

Example: 10 m³/h = 44.0287 GPM.

To convert the other way: cubic metres per hour = US gallons per minute ÷ 4.402867539

Cubic metres per hour to US gallons per minute multiplies by about 4.403: a 10 m³/h pump is about 44 GPM. Common when matching a metric pump curve to US system requirements.

Cubic metres per hour to US gallons per minute conversion table

Cubic metres per hour (m³/h)	US gallons per minute (GPM)
0.1	0.44028675
0.25	1.1007169
0.5	2.2014338
1	4.4028675
2	8.8057351
3	13.208603
4	17.61147
5	22.014338
6	26.417205
7	30.820073
8	35.22294
9	39.625808
10	44.028675
15	66.043013
20	88.057351
25	110.07169
30	132.08603
40	176.1147
50	220.14338
75	330.21507
100	440.28675
250	1100.7169
500	2201.4338
1000	4402.8675

About the units

What is a cubic metre per hour?

A cubic metre per hour is 1/3600 m³/s. Pumps, HVAC and water systems are often rated in m³/h.

What is a us gallon per minute?

US gallons per minute — the standard US pump and plumbing rate. One GPM is about 3.785 L/min.

Frequently asked questions

How many US gallons per minute are in 1 cubic metre per hour?

1 cubic metre per hour (m³/h) = 4.402867539 US gallons per minute (GPM).

What is the formula to convert cubic metres per hour to US gallons per minute?

US gallons per minute = cubic metres per hour × 4.402867539 — multiply the cubic metre per hour value by 4.40287.

How do I convert m³/h to GPM without a calculator?

Multiply by 4.4 for a close estimate. Exact factor: 1 m³/h = 4.402867539 GPM.

Is this m³/h-to-GPM converter accurate and private?

Yes. It uses the exact internationally defined conversion factors and computes results locally in your browser — your input is never sent to a server, and the page keeps working offline.