GPM to CFH Converter
Enter the flow rate in gpm below to convert it to cfh.
Convert GPM (US) to CFH
Enter a value in gpm (us) (GPM) to convert to cfh (CFH).
US Gallons per Minute to Cubic Feet per Hour Conversion Table
Table showing various us gallons per minute measurements converted to cfh. Click any preset value or arrow to load it into the converter.
| GPM (US) (GPM) | CFH (CFH) |
|---|---|
| 1 GPM | 8.0208333 CFH |
| 2 GPM | 16.0416667 CFH |
| 2.5 GPM | 20.0520833 CFH |
| 5 GPM | 40.1041667 CFH |
| 10 GPM | 80.2083333 CFH |
| 15 GPM | 120.3125 CFH |
| 20 GPM | 160.4166667 CFH |
| 25 GPM | 200.5208333 CFH |
| 30 GPM | 240.625 CFH |
| 50 GPM | 401.0416667 CFH |
How to Convert GPM to CFH
To convert gpm to cfh, multiply the flow rate by the following conversion ratio: 8.0208333 cfh/us gallons per minute.
Since one us gallons per minute is equal to 8.0208333 cfh, you can use this simple formula to convert:
The flow rate in cfh is equal to the flow rate in gpm multiplied by 8.0208333.
For example, here's how to convert 5 gpm to cfh using the formula above.
How Many CFH Are in a US Gallons per Minute?
There are 8.0208333 cfh in a us gallons per minute, which is why we use this value in the formula above.
Our us gallons per minute to cubic feet per hour calculator automatically converts your flow rate measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
GPM and cfh are both units used to measure flow rate. Keep reading to learn more about each unit.
What Is a US Gallons per Minute?
A us gallons per minute is a unit of flow rate equal to 3.7854118 liters per minute (L/min), the base unit for flow rate. Standard US plumbing & pump flow rate (3.78541 L/min). [1]
The us gallons per minute is classified as a US customary unit of flow rate. GPM can be abbreviated as GPM; for example, 1 us gallons per minute can be written as 1 GPM.
When working with gpm (GPM) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, gpm (GPM) are widely used across standard flow rate applications within US customary workflows, engineering documentation, and technical data sheets.
What Is a Cubic Feet per Hour?
A cubic feet per hour is a unit of flow rate equal to 0.4719474 liters per minute (L/min), the base unit for flow rate. Gas meter flow unit (0.47195 L/min). [2]
The cubic feet per hour is classified as a US customary unit of flow rate. CFH can be abbreviated as CFH; for example, 1 cubic feet per hour can be written as 1 CFH.
When working with cfh (CFH) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, cfh (CFH) are widely used across standard flow rate applications within US customary workflows, engineering documentation, and technical data sheets.
When converting flow rate between gpm (GPM) and cfh (CFH), keep full floating-point precision (1 GPM = 8.0208333 CFH; 1 CFH = 0.1246753 GPM) during intermediate calculations and round only the final cubic feet per hour figure to match your instrument tolerance.
More US Gallons per Minute & Cubic Feet per Hour Conversions
Need to calculate in the opposite direction? Use our cfh to gpm (us) calculator to switch your starting unit immediately. You can also explore related tools such as converting cfh to gpm (us), converting gpm (us) to liters per minute, or converting gpm (us) to m³/s.
Frequently Asked Questions
References
- [1]NIST SP 811 StandardNIST SP 811 (NIST SP 811 App. B.9 (Volume Divided by Time))·Flow Rate Metrology Standard — GPM (US) (GPM) to CFH (CFH)
- [2]NIST OWM SpecificationNIST OWM (SI Units — Volume & Flow Capacity)·Unit Specifications: US Gallons per Minute (GPM) (GPM) & Cubic Feet per Hour (CFH / SCFH) (CFH)
- [3]BIPM ReferenceBIPM (Coherent Volumetric Flow Units (m³/s))·Conversion Factors & Mathematical Basis (GPM to CFH)