Flat & Sloped Roof Snow Load Pressure (ps / pf in kN/m² & psf) Estimator
Calculate design snow load on residential and commercial building roofs: ground snow load conversion (pg), roof slope shape factor (Cs), thermal (Ct) and wind exposure (Ce) coefficients under ASCE 7-16 and Eurocode 1 standards.
Sloped Roof Design Snow Load (kN/m²)
Calculator Inputs
Sloped Roof Design Snow Load (kN/m²)
Roof Snow Weight in Kilograms / Sq Meter (kg/m²)
Roof Snow Load in Pounds / Sq Ft (psf)
Roof Slope Reduction Factor (Cs)
Flat Roof Reference Snow Load
Flat vs. Sloped Roof Snow Load (kN/m²) Breakdown
Unbalanced snow drifting (snow drifts against parapets, dormers, and valleys) must be checked separately for structural roof joist design.
All engineering calculations, structural estimates, and electrical sizing metrics are provided for preliminary estimation only. Always ensure compliance with relevant statutory building codes and occupational safety standards, verified by a certified professional engineer before practical implementation.
Calculation Methodology
Flat Roof Snow Load pf = 0.7 * Ce * Ct * Is * pg. Sloped Roof Snow Load ps = Cs * pf (where Cs reduces from 1.0 at 30° down to 0.0 at 70° for slippery roofs).
Frequently Asked Questions
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