CFM to m³/h Airflow Converter
Convert fan airflow ratings between CFM, cubic meters per hour (m³/h), and liters per second. Match fan specs to your PC case, 3D printer enclosure, or workshop extraction needs.
Last updated: May 2026
Enter a value to see the conversion instantly.
How to use this airflow converter
PC case fans list specs in CFM. European ventilation equipment uses m³/h. Lab equipment might show L/s. Enter your fan rating in one unit and immediately see what it means in the others. The quick buttons cover typical PC case fans (20-50 CFM), CPU coolers (50-120 CFM), and workshop extractors (200+ CFM).
Common airflow reference values
| Application | CFM | m³/h | L/s |
|---|---|---|---|
| Small case fan (80mm) | 20-30 CFM | 34-51 m³/h | 9.4-14 L/s |
| Standard case fan (120mm) | 50-70 CFM | 85-119 m³/h | 24-33 L/s |
| High-performance CPU cooler | 80-120 CFM | 136-204 m³/h | 38-57 L/s |
| 3D printer enclosure fan | 30-50 CFM | 51-85 m³/h | 14-24 L/s |
| Small workshop extractor | 200-400 CFM | 340-680 m³/h | 94-189 L/s |
| Cabinet ventilation | 100-150 CFM | 170-255 m³/h | 47-71 L/s |
| Server rack cooling | 150-300 CFM | 255-510 m³/h | 71-142 L/s |
When you need this tool
You're building a Voron 3D printer enclosure and the filtration fan datasheet shows 85 m³/h but the build guide recommends 50 CFM minimum. Or you're upgrading your PC case fans and the Noctua specs say 140mm fans at 68.5 CFM but your old fans were rated in m³/h. Just convert it here. Proper airflow prevents heat creep in hotends, keeps resin fumes contained, and stops PC throttling.