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Volumetric Flow Rate

gph (US)tom³/hr

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

Factor1 gph (US) = 0.003785412 m³/hr

Converter

gph (US)

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

Result
0.378541m³/hr

Rendered to 6 significant figures.

Formula

Formula
m³/hr = gph (US) × 0.003785412

Multiply any value in US gallons per hour by 0.003785412 to obtain the value in cubic metres per hour.

Worked example

Convert 100 gph (US) to m³/hr.

  1. 01Start with 100 gph (US).
  2. 02Multiply by the conversion factor: 100 × 0.003785412 = 0.378541 m³/hr.
Result100 gph (US) = 0.378541 m³/hr

Conversion table

gph (US)m³/hr
10.0037854
20.0075708
50.018927
100.037854
200.075708
500.18927
1000.37854
2000.75708
5001.8927
10003.7854

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from gph (US) to m³/hr?
1 gph (US) equals 0.003785412 m³/hr. To convert, multiply the value in US gallons per hour by 0.003785412.
How do I convert 1 gph (US) to m³/hr?
1 gph (US) = 0.00378541 m³/hr. For any value, multiply by 0.003785412.
How do I convert m³/hr back to gph (US)?
Divide by the same factor — or equivalently, multiply by 264.1721. So 1 m³/hr = 264.172 gph (US).
When would I need to convert US gallon per hour 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. gph (US) to m³/hr is a frequently needed conversion for flow datasheet preparation.
Is the conversion exact?
Yes. Both gph (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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