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Volumetric Flow Rate

cfmtoIGal/hr

Convert cubic feet per minute (cfm) to Imperial gallons per hour (IGal/hr).

Factor1 cfm = 373.7301 IGal/hr

Converter

cfm

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

Result
373.73IGal/hr

Rendered to 6 significant figures.

Formula

Formula
IGal/hr = cfm × 373.7301

Multiply any value in cubic feet per minute by 373.7301 to obtain the value in Imperial gallons per hour.

Worked example

Convert 1 cfm to IGal/hr.

  1. 01Start with 1 cfm.
  2. 02Multiply by the conversion factor: 1 × 373.7301 = 373.73 IGal/hr.
Result1 cfm = 373.73 IGal/hr

Conversion table

cfmIGal/hr
1373.73
2747.46
51868.7
103737.3
207474.6
5018687
10037373
20074746
5001.8687e+5
10003.7373e+5

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from cfm to IGal/hr?
1 cfm equals 373.7301 IGal/hr. To convert, multiply the value in cubic feet per minute by 373.7301.
How do I convert 1 cfm to IGal/hr?
1 cfm = 373.73 IGal/hr. For any value, multiply by 373.7301.
How do I convert IGal/hr back to cfm?
Divide by the same factor — or equivalently, multiply by 0.002675728. So 1 IGal/hr = 0.00267573 cfm.
When would I need to convert cubic foot per minute to Imperial gallon 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. cfm to IGal/hr 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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