Snow Load Calculator

Calculate roof snow load in PSF based on snow depth, type, and roof pitch. Assess structural risk level.

Inputs

Snow Depth

inches

Roof Area

sq ft

Snow Type

Roof Pitch (degrees)

Tab to move between fields

Results

Load per Sq Ft

14.1 PSF

Total Roof Load21,143 lbs

Total Load10.57 tons

Risk LevelLow

% of Typical Capacity47%

How to Use This Calculator

Enter the Snow Depth in inches on your roof.
Set the Roof Area in square feet.
Select the Snow Type: fresh/light, settled, packed, or ice (density varies significantly).
Enter the Roof Pitch in degrees (flat roofs accumulate more load).
Review Load per Square Foot (PSF), Total Roof Load in lbs, and Total Load in tons.

How the result changes with Snow Depth

Snow Depth	Load per Sq Ft
13	15.27 PSF
43	50.51 PSF
78	91.62 PSF
108	126.86 PSF

What each input means

Snow Depth: Depth of snow accumulation.
Roof Area: Roof surface area.
Snow Type: Type of snow (fresh, packed, wet).

How this is calculated

Worked example, using the default values

Identify Input Parameters
4 parameters
Snow Depth = 12, Roof Area = 1500, Snow Type = 1, Roof Pitch (degrees) = 20 = 4 input(s) provided
Calculate Load per Sq Ft
14.1 = 14.1
Calculate Total Roof Load
Total Roof Load
21143 = 21143
Calculate Total Load
Total Load
10.57 = 10.57

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