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Volumetric Flow Rate

IGal/hrtocfm

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

Factor1 IGal/hr = 0.002675728 cfm

Converter

IGal/hr

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

Result
0.267573cfm

Rendered to 6 significant figures.

Formula

Formula
cfm = IGal/hr × 0.002675728

Multiply any value in Imperial gallons per hour by 0.002675728 to obtain the value in cubic feet per minute.

Worked example

Convert 100 IGal/hr to cfm.

  1. 01Start with 100 IGal/hr.
  2. 02Multiply by the conversion factor: 100 × 0.002675728 = 0.267573 cfm.
Result100 IGal/hr = 0.267573 cfm

Conversion table

IGal/hrcfm
10.0026757
20.0053515
50.013379
100.026757
200.053515
500.13379
1000.26757
2000.53515
5001.3379
10002.6757

Reference values rounded to 5 significant figures for display.

FAQ

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