Convert airflow between CFM, CMH (m³/h), L/s, m³/s and m³/min. Results update as you type.
| From | to CFM | to m³/h (CMH) | to L/s |
|---|---|---|---|
| 1 CFM | 1 | 1.6990 | 0.4719 |
| 1 m³/h (CMH) | 0.5886 | 1 | 0.2778 |
| 1 L/s | 2.1189 | 3.6 | 1 |
| 1 m³/s | 2,118.9 | 3,600 | 1,000 |
| 1 m³/min | 35.315 | 60 | 16.667 |
| CFM | m³/h (CMH) | L/s |
|---|---|---|
| 100 | 170 | 47.2 |
| 200 | 340 | 94.4 |
| 300 | 510 | 141.6 |
| 400 | 680 | 188.8 |
| 500 | 850 | 236.0 |
| 600 | 1,019 | 283.2 |
| 800 | 1,359 | 377.6 |
| 1,000 | 1,699 | 471.9 |
| 1,200 | 2,039 | 566.3 |
| 1,500 | 2,549 | 707.9 |
| 2,000 | 3,398 | 943.9 |
| 2,500 | 4,248 | 1,179.9 |
| 3,000 | 5,097 | 1,415.8 |
| 4,000 | 6,796 | 1,887.8 |
| 5,000 | 8,495 | 2,359.7 |
| 6,000 | 10,194 | 2,831.7 |
| 8,000 | 13,592 | 3,775.6 |
| 10,000 | 16,990 | 4,719.5 |
| m³/h (CMH) | CFM | L/s |
|---|---|---|
| 100 | 59 | 27.8 |
| 250 | 147 | 69.4 |
| 500 | 294 | 138.9 |
| 750 | 441 | 208.3 |
| 1,000 | 589 | 277.8 |
| 1,500 | 883 | 416.7 |
| 2,000 | 1,177 | 555.6 |
| 2,500 | 1,471 | 694.4 |
| 3,000 | 1,766 | 833.3 |
| 5,000 | 2,943 | 1,388.9 |
| 7,500 | 4,414 | 2,083.3 |
| 10,000 | 5,886 | 2,777.8 |
| 15,000 | 8,829 | 4,166.7 |
| 20,000 | 11,772 | 5,555.6 |
Converting cooling capacity to airflow? Use the TR to CFM Calculator. To size the duct for that airflow, use the Online Ductulator, and for fresh air rates the Fresh Air & ACH Calculator.
Multiply CFM by 1.699. One cubic foot per minute equals 1.699 cubic metres per hour, so 1,000 CFM = 1,699 m³/h (CMH).
Multiply CMH by 0.5886, or divide by 1.699. For example, 1,000 m³/h = 588.6 CFM.
1 CFM = 0.4719 L/s, so 1,000 CFM = 471.9 L/s. In the other direction, 1 L/s = 2.119 CFM.
Multiply L/s by 3.6. For example, 100 L/s = 360 m³/h.
There is none. CMH stands for cubic metres per hour, the same unit as m³/h. It is common on HVAC equipment schedules in Europe, the Middle East and Asia.
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