Soffit Vent Area
Calculator
Net free vent area (m²)
0.666666
Results
- Net free vent area (m²)
- 0.666666
- Net free vent area (cm²)
- 6,666.666666
Construction results
| Net free vent area (m²) | 0.666666 |
| Net free vent area (cm²) | 6,666.666666 |
formula-map diagram
- Net free vent area (m²)
- 0.666666
- Net free vent area (cm²)
- 6,666.666666
Formula breakdown
Formula
net free area = attic floor area ÷ ratio denominator (typically 1/150)= 0.66666666666667
Note
Simplified model: results are quantity estimates only. They ignore openings, overlaps, cuts, site conditions and local building codes. Structural figures are not a substitute for a design by a qualified engineer.