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Snow Load on Roof Calculator

Pounds of snow per ft² (and total) from depth and density.

Estimate the snow load on a roof from the snow depth and snow density: load (lb/ft²) = depth (in) · density / 12. Reports total weight on a given roof area.

Marcus Laurent By Marcus Laurent
Published Last reviewed 1 min read

Inputs

in
ft²

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Load (psf) = depth_in · density_pcf / 12. Total = load · roof_area.

In depth

Estimate the snow load on a roof from the snow depth and snow density: load (lb/ft²) = depth (in) · density / 12. Reports total weight on a given roof area.