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Flow Rate

gpm (US)tom³/hr

Convert US gallons per minute (gpm (US)) to cubic metres per hour (m³/hr).

Factor1 gpm (US) = 0.2271247 m³/hr

Converter

gpm (US)

Accepts numbers or expressions, e.g. 150 + 14.7

Result
56.7812m³/hr

Rendered to 6 significant figures.

Formula

Formula
m³/hr = gpm (US) × 0.2271247

Multiply any value in US gallons per minute by 0.2271247 to obtain the value in cubic metres per hour.

Worked example

Convert 250 gpm (US) to m³/hr.

  1. 01Start with 250 gpm (US).
  2. 02Multiply by the conversion factor: 250 × 0.2271247 = 56.7812 m³/hr.
Result250 gpm (US) = 56.7812 m³/hr

Conversion table

gpm (US)m³/hr
10.22712
20.45425
51.1356
102.2712
204.5425
5011.356
10022.712
20045.425
500113.56
1000227.12

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from gpm (US) to m³/hr?
1 gpm (US) equals 0.2271247 m³/hr. To convert, multiply the value in US gallons per minute by 0.2271247.
How do I convert 1 gpm (US) to m³/hr?
1 gpm (US) = 0.227125 m³/hr. For any value, multiply by 0.2271247.
How do I convert m³/hr back to gpm (US)?
Divide by the same factor — or equivalently, multiply by 4.402868. So 1 m³/hr = 4.40287 gpm (US).
When would I need to convert US gallon per minute to cubic metre per hour?
Flow-rate conversions show up in pump curve interpretation, control valve sizing (Cv vs Kv), and aligning vendor specifications with process simulation outputs. gpm (US) to m³/hr is a frequently needed conversion for flow datasheet preparation.
Is the conversion exact?
Yes. Both gpm (US) and m³/hr are defined by exact SI relationships, so the displayed factor is exact (any rounding shown is only for display).

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