Roof Snow Load Calculator

PSF by Region, Slope & Exposure

The Snow Load Calculator returns the design snow load on your roof in pounds per square foot using the ASCE 7 method. Enter the ground snow load for your region (from local building code maps, typically 20-100 PSF), exposure category (B, C, or D), thermal factor, and roof slope, and the tool returns the design roof snow load. Steeper roofs and warmer roofs shed snow faster and carry less load. Critical for sizing rafters, trusses, and structural sheathing in cold climates.