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Gallons per Minute (GPM) to Cubic Meters per Hour (m³/hr) Calculator

Last updated: 27 Sep 2025 | Author: Brij | Review By: Irshad
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Convert Gallons per Minute (GPM) to Cubic Meters per Hour (m³/hr) instantly with our free calculator. Useful for fluid flow calculations in engineering, water supply, HVAC, and industrial systems.

GPM
Gallons per Minute
m³/hr
Cubic Meters per Hour

Flow rates are often measured in GPM (Gallons per Minute) in the U.S., while in international engineering projects, m³/hr (Cubic Meters per Hour) is more common. Converting between these units ensures accuracy in pump sizing, fluid transport, and system design.

Our GPM to m³/hr Calculator provides a quick and accurate conversion.

Formula: GPM to m³/hr Conversion

The conversion is based on the relationship: 1 GPM ≈ 0.227124 m³/hr.

m³/hr=GPM×0.227124\text{m³/hr} = \text{GPM} \times 0.227124m³/hr=GPM×0.227124

Example Calculation

Suppose you have a water flow of 500 GPM. To convert it to m³/hr:

m³/hr=500×0.227124≈113.56\text{m³/hr} = 500 \times 0.227124 \approx 113.56m³/hr=500×0.227124≈113.56

So, 500 GPM ≈ 113.56 m³/hr.

Conclusion

The GPM to m³/hr Calculator is a simple and reliable tool for engineers, technicians, and contractors. Whether you’re working on pumps, pipelines, or HVAC systems, this conversion ensures smooth communication between U.S. customary units and metric systems.

FAQs

1. Why is converting GPM to m³/hr important in construction or plumbing?

In construction and plumbing, GPM is commonly used in the U.S., while m³/hr is a metric unit used globally for water flow in systems like HVAC, irrigation, or wastewater management. Converting GPM to m³/hr ensures compatibility with international standards or equipment specifications.

2. How do I convert GPM to m³/hr for large-scale water systems?

Use the conversion factor 0.227125 for large-scale systems. For example, a system with 500 GPM would be 500 × 0.227125 = 113.5625 m³/hr. For accuracy, use a calculator or software, especially in critical applications like municipal water supply or industrial plumbing.

3. Are there tools to simplify GPM to m³/hr conversion?

Yes, online flow rate calculators on engineering or plumbing websites can quickly convert GPM to m³/hr. Alternatively, you can use a spreadsheet formula (e.g., =A1*0.227125 in Excel, where A1 is the GPM value) for easy and accurate conversions.


Gallons per Minute (GPM) to Cubic Meters per Hour (m³/hr) Calculator

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