Given volumetric flow rate Q and target air velocity v, this tool computes the required area A = Q / v and proposes both circular and rectangular duct sections that meet the target within a tolerance.
m/s
Required cross-section area A: — m²
Exact circular diameter to hit v: — mm
Flow used in calc: — m³/s | Velocity target: — m/s
Change units and values above to update instantly.
Circular duct options
| Diameter (mm) | Area (m²) | Velocity (m/s) | Δ % vs target |
|---|
Rectangular duct options
| W × H (mm) | Area (m²) | Velocity (m/s) | Aspect ratio | Δ % vs target |
|---|