Convert Gallons per minute to Cubic meters per hour
Instantly convert Gallons per minute (GPM) to Cubic meters per hour (m³/hr) with our free online calculator.
Formula: GPM to m³/hr — multiply by 0.227125
Reference Table
| Gallons per minute (GPM) | Cubic meters per hour (m³/hr) |
|---|---|
| 1 | 0.227125 |
| 5 | 1.13562 |
| 10 | 2.27125 |
| 25 | 5.67812 |
| 50 | 11.3562 |
| 100 | 22.7125 |
How to Convert Gallons per minute to Cubic meters per hour
Formula
To convert Gallons per minute (GPM) to Cubic meters per hour (m³/hr): multiply by 0.227125
Step-by-Step
- Start with your value in Gallons per minute (GPM).
- Multiply by 0.227125 to perform the conversion.
- The result is your value expressed in Cubic meters per hour (m³/hr).
Conversion Factor
1 GPM = 0.227125 m³/hr
Reverse Factor
1 m³/hr = 4.40287 GPM
Worked Example
Convert 25 Gallons per minute to Cubic meters per hour: 25 GPM = 5.67812 m³/hr
About Gallon per minute (GPM)
A US customary flow-rate unit (US gallons per minute, where 1 US gallon = 3.785411784 liters per NIST SP 811) used universally in US plumbing, HVAC, fire protection, agricultural irrigation, and swimming-pool circulation. GPM is the primary US sizing unit for residential water softeners (the IAPMO Z601 test method rates ion-exchange capacity at a defined GPM), well-pump submersibles, lawn sprinkler design (the GPM at each emitter sets zone sizing), NFPA 13 fire-sprinkler systems (head-flow allocations in GPM), and pool circulation (turnover rates require X GPM × hours). Reference values: a US WaterSense-certified showerhead is ≤ 2.0 GPM, an older US showerhead is 2.5-3 GPM, a residential dishwasher is ~3-4 GPM peak, a 4-inch municipal fire hydrant delivers 500-1,500 GPM (NFPA test pressure 20 psi residual). 1 GPM = 3.7854 L/min = 0.06309 L/s. Care: US GPM ≠ Imperial GPM (a UK gallon is 4.54609 L, so 1 Imperial GPM = 1.201 US GPM).
About Cubic meter per hour (m³/hr)
A metric flow-rate unit equal to exactly 1/3,600 m³/s. m³/hr is the de-facto standard unit for industrial process flows in metric countries, HVAC air handling (DIN EN 16798 / ASHRAE 62.1 ventilation calcs), pump sizing in European pump curves (KSB, Grundfos, Wilo specifications), natural-gas metering and the gas grid balance reports (TSO data is in Mm³/hr), municipal water-treatment plant capacity, and biogas/anaerobic-digester output. European building-code minimum air-exchange rates (e.g., German DIN 1946 fresh-air requirements per occupant) and Eurovent-certified fan-coil ratings are almost always expressed in m³/hr. Practical reference: a typical residential heat-recovery ventilation unit moves 100-400 m³/hr; an industrial centrifugal pump might be rated at 50-5,000 m³/hr. Convert to GPM by multiplying by 4.403, to CFM by multiplying by 0.5886, to L/s by dividing by 3.6.
Quick Facts
- 1 Gallon per minute equals 0.227125 Cubic meters per hour
- 1 Cubic meter per hour equals 4.40287 Gallons per minute
- Gallon per minute is a unit of volumetric flow rate
- Cubic meter per hour is a unit of volumetric flow rate
- This conversion is commonly used in plumbing, HVAC systems, and chemical process engineering
- The Gallon per minute belongs to the imperial system
- The Cubic meter per hour belongs to the metric system
Common Gallon per minute to Cubic meter per hour Conversions
| Gallons per minute (GPM) | Cubic meters per hour (m³/hr) |
|---|---|
| 0.01 | 0.00227125 |
| 0.1 | 0.0227125 |
| 0.25 | 0.0567812 |
| 0.5 | 0.113562 |
| 1 | 0.227125 |
| 2 | 0.454249 |
| 3 | 0.681374 |
| 5 | 1.13562 |
| 10 | 2.27125 |
| 15 | 3.40687 |
| 20 | 4.54249 |
| 25 | 5.67812 |
| 50 | 11.3562 |
| 75 | 17.0344 |
| 100 | 22.7125 |
| 250 | 56.7812 |
| 500 | 113.562 |
| 1000 | 227.125 |
| 5000 | 1135.62 |
| 10000 | 2271.25 |
Understanding Gallons per minute
The Gallon per minute (symbol: GPM) is a unit of volumetric flow rate. A US customary flow-rate unit (US gallons per minute, where 1 US gallon = 3.785411784 liters per NIST SP 811) used universally in US plumbing, HVAC, fire protection, agricultural irrigation, and swimming-pool circulation. GPM is the primary US sizing unit for residential water softeners (the IAPMO Z601 test method rates ion-exchange capacity at a defined GPM), well-pump submersibles, lawn sprinkler design (the GPM at each emitter sets zone sizing), NFPA 13 fire-sprinkler systems (head-flow allocations in GPM), and pool circulation (turnover rates require X GPM × hours). Reference values: a US WaterSense-certified showerhead is ≤ 2.0 GPM, an older US showerhead is 2.5-3 GPM, a residential dishwasher is ~3-4 GPM peak, a 4-inch municipal fire hydrant delivers 500-1,500 GPM (NFPA test pressure 20 psi residual). 1 GPM = 3.7854 L/min = 0.06309 L/s. Care: US GPM ≠ Imperial GPM (a UK gallon is 4.54609 L, so 1 Imperial GPM = 1.201 US GPM).
It belongs to the imperial measurement system.
Gallons per minute are commonly used in plumbing, HVAC systems, and chemical process engineering.
Understanding Cubic meters per hour
The Cubic meter per hour (symbol: m³/hr) is a unit of volumetric flow rate. A metric flow-rate unit equal to exactly 1/3,600 m³/s. m³/hr is the de-facto standard unit for industrial process flows in metric countries, HVAC air handling (DIN EN 16798 / ASHRAE 62.1 ventilation calcs), pump sizing in European pump curves (KSB, Grundfos, Wilo specifications), natural-gas metering and the gas grid balance reports (TSO data is in Mm³/hr), municipal water-treatment plant capacity, and biogas/anaerobic-digester output. European building-code minimum air-exchange rates (e.g., German DIN 1946 fresh-air requirements per occupant) and Eurovent-certified fan-coil ratings are almost always expressed in m³/hr. Practical reference: a typical residential heat-recovery ventilation unit moves 100-400 m³/hr; an industrial centrifugal pump might be rated at 50-5,000 m³/hr. Convert to GPM by multiplying by 4.403, to CFM by multiplying by 0.5886, to L/s by dividing by 3.6.
It belongs to the metric measurement system.
Cubic meters per hour are commonly used in plumbing, HVAC systems, and chemical process engineering.
Why Convert Gallons per minute to Cubic meters per hour?
Converting between Gallons per minute and Cubic meters per hour is a frequent requirement for engineers, scientists, and students working with volumetric flow rate values. Different industries and regions favour different unit systems, so having a dependable conversion tool saves time and prevents errors in technical calculations. Whether you are verifying a specification sheet, cross-checking simulation results, or preparing a report for an international audience, accurate volumetric flow rate conversion is essential.
Frequently Asked Questions
How do I convert Gallons per minute to Cubic meters per hour?
A US customary flow-rate unit (US gallons per minute, where 1 US gallon = 3. To convert Gallons per minute to Cubic meters per hour, multiply by 0.227125. For example, 25 GPM equals 5.67812 m³/hr.
How many Cubic meters per hour are in 1 Gallon per minute?
There are 0.227125 Cubic meters per hour in 1 Gallon per minute.
How many Gallons per minute are in 1 Cubic meter per hour?
There are 4.40287 Gallons per minute in 1 Cubic meter per hour.
What is the formula for Gallon per minute to Cubic meter per hour conversion?
The formula is: multiply by 0.227125. This means 1 GPM = 0.227125 m³/hr.
Is a Gallon per minute bigger than a Cubic meter per hour?
Yes. One Gallon per minute is larger than one Cubic meter per hour because 1 GPM equals 0.227125 m³/hr, which is less than 1.
When do you need to convert between Gallons per minute and Cubic meters per hour?
A metric flow-rate unit equal to exactly 1/3,600 m³/s. Gallon per minute and Cubic meter per hour are both volumetric flow units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.