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Volumetric Flow Rate

IGal/hrtogpm (US)

Convert Imperial gallons per hour (IGal/hr) to US gallons per minute (gpm (US)).

Factor1 IGal/hr = 0.02001583 gpm (US)

Converter

IGal/hr

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

Result
2.00158gpm (US)

Rendered to 6 significant figures.

Formula

Formula
gpm (US) = IGal/hr × 0.02001583

Multiply any value in Imperial gallons per hour by 0.02001583 to obtain the value in US gallons per minute.

Worked example

Convert 100 IGal/hr to gpm (US).

  1. 01Start with 100 IGal/hr.
  2. 02Multiply by the conversion factor: 100 × 0.02001583 = 2.00158 gpm (US).
Result100 IGal/hr = 2.00158 gpm (US)

Conversion table

IGal/hrgpm (US)
10.020016
20.040032
50.10008
100.20016
200.40032
501.0008
1002.0016
2004.0032
50010.008
100020.016

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from IGal/hr to gpm (US)?
1 IGal/hr equals 0.02001583 gpm (US). To convert, multiply the value in Imperial gallons per hour by 0.02001583.
How do I convert 1 IGal/hr to gpm (US)?
1 IGal/hr = 0.0200158 gpm (US). For any value, multiply by 0.02001583.
How do I convert gpm (US) back to IGal/hr?
Divide by the same factor — or equivalently, multiply by 49.96045. So 1 gpm (US) = 49.9605 IGal/hr.
When would I need to convert Imperial gallon per hour to US gallon per minute?
Flow-rate conversions show up in pump curve interpretation, control valve sizing (Cv vs Kv), and aligning vendor specifications with process simulation outputs. IGal/hr to gpm (US) is a frequently needed conversion for flow datasheet preparation.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).

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