Conversions · calculator
m³/h to US GPM Flow Rate Converter
Convert volumetric flow rates between metric cubic meters per hour (m³/h) and US Gallons per Minute (GPM).
Method record
What this calculator measures
Volumetric flow rate conversion between metric m³/h and US GPM is governed by the volume equivalent 1 m³ = 264.172052 US Gallons. Dividing by 60 minutes yields 1 m³/h = 4.40286754 US GPM.
US GPM = m³/h × 4.40286754 Use it correctly
Calculation steps
- Select conversion direction (m³/h to GPM or GPM to m³/h).
- Enter the known volumetric flow rate.
- Read direct equivalents in GPM, m³/h, Liters/min, and cubic feet per second.
Applicability
Use the model within its limits
Distinguish US Gallons (231 cu in) from UK Imperial Gallons (277.42 cu in). This tool converts to US Customary GPM.
What this result represents
- System
- Conversions
- Formula
- US GPM = m³/h × 4.40286754
- Review
- Verify safety-sensitive work with qualified guidance.
Worked Field Example
Worked Example: Sizing a Metric Commercial Chilled Water Pump for US Specs
Field Scenario: An engineering procurement team imports a European chilled water circulation pump rated at 45.0 m³/h. What is the equivalent flow rate in US Gallons per Minute (GPM) and Liters per Minute (L/min) to verify compatibility with US HVAC specifications?
Given Input Parameters
Step-by-Step Mathematical Solution
- Convert m³/h to US GPM: Flow_GPM = 45.0 m³/h × 4.40286754 ≈ 198.13 US GPM.
- Convert to Liters per Minute: 45.0 m³/h × (1,000 L / 60 min) = 45,000 / 60 = 750.0 L/min.
- Convert to Cubic Feet per Second: 198.13 GPM ÷ 448.831 ≈ 0.441 cfs.
45.0 m³/h converts to 198.13 US GPM (750.0 L/min), matching standard 200 GPM US commercial HVAC hydronic loop designs.
Professional Guidance: Verify electrical motor frequencies: 50 Hz European pumps run 20% faster when connected to 60 Hz US power grids unless driven by a VFD.
Quick Answer & Key Principles
How Many GPM Is 1 m3/h?
Direct Answer: 1 cubic meter per hour (m³/h) equals exactly 4.4029 US Gallons per Minute (GPM). To convert m³/h to GPM, multiply by 4.403. To convert GPM to m³/h, divide by 4.403 (or multiply by 0.2271).
US GPM = m³/h × 4.40286754 - 1 m³/h = 4.403 US GPM
- 5 m³/h = 22.01 US GPM
- 10 m³/h = 44.03 US GPM
- 50 m³/h = 220.14 US GPM
- 100 m³/h = 440.29 US GPM
Engineering Standard Reference
Cubic Meters Per Hour (m³/h) to US GPM & Metric Flow Conversion Matrix
Standard industrial and municipal pump flow rate equivalents across metric (m³/h, L/min, L/s) and US Customary units (US GPM, cfs):
| m³/h (Metric Flow) | US GPM | Liters / Minute (L/min) | Liters / Second (L/s) | Cubic Feet / Sec (cfs) | Typical Application |
|---|---|---|---|---|---|
| 1.0 m³/h | 4.40 GPM | 16.7 L/min | 0.28 L/s | 0.0098 cfs | Residential booster pump |
| 2.5 m³/h | 11.01 GPM | 41.7 L/min | 0.69 L/s | 0.0245 cfs | Small domestic irrigation zone |
| 5.0 m³/h | 22.01 GPM | 83.3 L/min | 1.39 L/s | 0.0490 cfs | Light commercial water supply |
| 10.0 m³/h | 44.03 GPM | 166.7 L/min | 2.78 L/s | 0.0981 cfs | Commercial HVAC chiller loop |
| 25.0 m³/h | 110.07 GPM | 416.7 L/min | 6.94 L/s | 0.2452 cfs | Agricultural irrigation pump |
| 50.0 m³/h | 220.14 GPM | 833.3 L/min | 13.89 L/s | 0.4905 cfs | Industrial process water main |
| 100.0 m³/h | 440.29 GPM | 1,666.7 L/min | 27.78 L/s | 0.9810 cfs | Municipal booster station |
| 250.0 m³/h | 1,100.72 GPM | 4,166.7 L/min | 69.44 L/s | 2.4524 cfs | Municipal water main / Fire pump |
Engineering Note: 1 m³ = 1,000 Liters = 264.172 US Gallons. Because there are 60 minutes in an hour, 1 m³/h = 264.172 / 60 = 4.40287 US GPM.
Engineering FAQs
Frequently Asked Questions
How do you convert m3/h to GPM?
To convert cubic meters per hour (m³/h) to US Gallons per Minute (GPM), multiply the m³/h value by 4.40287. For example, 10 m³/h × 4.40287 = 44.03 US GPM.
How do you convert GPM to m3/h?
To convert US GPM to cubic meters per hour (m³/h), divide the GPM value by 4.40287 (or multiply by 0.227125). For example, 100 GPM ÷ 4.40287 = 22.71 m³/h.
Is US GPM the same as UK Imperial GPM?
No. One US gallon equals 3.7854 liters (231 cubic inches), while one UK Imperial gallon equals 4.5461 liters (277.42 cubic inches). Consequently, 1 m³/h equals 4.403 US GPM, but only 3.666 Imperial GPM.