Snow Load Calculator
Free snow load calculator for roofs. Calculate snow loads using simple depth-based method or ASCE 7 standards with exposure, thermal, and importance factors.
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Calculate Roof Snow Loads
Our snow load calculator helps engineers, contractors, and homeowners determine the weight of snow on roofs. Choose the simple depth-based method for quick estimates or use the ASCE 7 engineering standard for precise structural calculations.
What Is Snow Load?
Snow load is the weight of accumulated snow on a roof, measured in pounds per square foot (psf) or kilonewtons per square meter (kN/m²). It varies based on snow density (fresh vs. packed), depth, and roof characteristics. Structural engineers use ASCE 7 to calculate design snow loads.
ASCE 7 Flat Roof Formula
Pf = 0.7 × Ce × Ct × Is × PgWhy Calculate Snow Load?
Structural Safety
Prevent roof collapse by ensuring structures can handle expected snow loads.
Building Codes
Meet local building code requirements for snow load resistance.
Snow Removal Decisions
Know when accumulated snow exceeds safe limits and needs removal.
How to Use This Calculator
Common Applications
Roof Design
Engineers calculate design snow loads for new construction.
Home Safety
Homeowners assess whether to remove snow after heavy storms.
Commercial Buildings
Facility managers monitor snow loads on flat commercial roofs.
Insurance
Document snow loads for potential insurance claims.
Frequently Asked Questions
Snow weight varies dramatically by type. Fresh fluffy snow weighs about 5-10 lb/ft³, while packed snow is 15-25 lb/ft³, and wet heavy snow can reach 25-35 lb/ft³. Ice is even heavier at 57 lb/ft³.