Convert flow rate units — m³/s, L/s, L/min, ft³/s, gallon/min and more.
| Unit | Name | Value |
|---|---|---|
| m³/s | Cubic Meter/Second | 0.0000010515 |
| m³/min | Cubic Meter/Minute | 0.000063088738 |
| m³/h | Cubic Meter/Hour | 0.0037823741 |
| L/s | Liter/Second | 0.0010515 |
| L/min | Liter/Minute | 0.063088738 |
| ft³/s | Cubic Foot/Second | 0.000037133171 |
| ft³/min | Cubic Foot/Minute | 0.0022277542 |
| gal/min | Gallon/Minute (US) | 0.016666667 |
Formula: CFM = gal/h × 0.002228
Multiply any gal/h value by 0.002228 to get CFM.
Reverse: gal/h = CFM × 448.8
Common flow rate values — factor: 1 gal/h = 0.002228 CFM
| gal/h (gal/h) | CFM (CFM) | Context |
|---|---|---|
| 0.1 gal/h | 0.0002228 CFM | Drip |
| 1 gal/h | 0.002228 CFM | Slow drip 1 gal/h |
| 5 gal/h | 0.01114 CFM | Dripping faucet |
| 10 gal/h | 0.02228 CFM | Fuel consumption |
| 50 gal/h | 0.1114 CFM | Water softener |
| 100 gal/h | 0.2228 CFM | Pool fill |
| 500 gal/h | 1.114 CFM | Small pump |
| 1000 gal/h | 2.228 CFM | Irrigation |
| 5000 gal/h | 11.14 CFM | Commercial |
| 1e+04 gal/h | 22.28 CFM | Large system |
| 5e+04 gal/h | 111.4 CFM | Industrial |
| 1e+05 gal/h | 222.8 CFM | Very large |
| 1e+06 gal/h | 2228 CFM | River scale |
| 1e+07 gal/h | 2.228e+04 CFM | Large river |
| 1e+08 gal/h | 2.228e+05 CFM | Max |
1 gal/h = 0.002228 CFM.
m³/s × 1000 = L/s × 60 = L/min. Use this chain for quick conversions.
Multiply result by 448.8 to recover the original gal/h value.
Designs pumps, pipes, and water distribution systems with flow rates in m³/s, L/s, and GPM.
Specifies air handling units and ductwork in CFM (ft³/min) and m³/h for North American and European projects.
Monitors and controls treatment processes with flow rates in m³/h, L/s, and MGD.
Designs sprinkler systems with required flows in GPM and L/min per NFPA standards.
Measures river and groundwater flows in m³/s (m) and ft³/s (cfs) for flood modeling and water resource planning.
Configures ventilators and oxygen delivery systems with flow rates specified in L/min.
Gallons per hour (gal/h) is used for slower flow rates such as fuel consumption, slow drip irrigation, and residential water softeners. One gal/h = 1.0514 × 10⁻⁶ m³/s ≈ 0.0631 L/min.
Vehicle fuel consumption at highway speeds is typically 2–8 gal/h for gasoline engines. Water softeners regenerate at 0.5–2 gal/h. Fuel oil burners for home heating consume 0.7–3 gal/h depending on output.
Interesting fact: A dripping faucet (one drip per second) wastes about 3,000 gallons per year — roughly 0.34 gal/h. A running toilet can waste 200 gal/h, adding up to nearly 2 million gallons over a year if unrepaired.
Cubic feet per minute (CFM) is the dominant airflow unit in North American HVAC, ventilation, and pneumatic systems. One CFM = 0.000472 m³/s = 28.32 L/min.
HVAC systems in the US are universally specified in CFM: a typical bedroom requires 50–100 CFM of ventilation; a commercial kitchen exhaust hood needs 300–1,500 CFM; a large data center cooling system may require 100,000+ CFM.
Interesting fact: The term CFM is so entrenched in US building practice that even metric-preferring engineers typically specify airflows in CFM for North American projects. Air compressors are rated in CFM at a specified pressure (e.g., '10 CFM @ 90 psi').
Converting gal/h to CFM is essential across hydraulic engineering, HVAC, water treatment, fire protection, and medicine. SI units (m³/s, L/s) are standard in science; European engineering uses m³/h; US systems use GPM and CFM; medical applications use L/min.
Quick reference: 10 gal/h = 0.02228 CFM. Reverse: 1 CFM = 448.8 gal/h. Factor: 1 gal/h = 0.002228 CFM.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.