The Weight of Snow calculator computes the approximate weight (mass) of snow on a given area (A) (e.g. roof) based on the depth (d) and type (sT) of snow.
INSTRUCTIONS: Choose units and enter the following:
Weight of Snow (W): The calculator returns the weight of snow in kilograms. However this can be automatically converted to other weight or mass units (e.g. pounds or tons) via the pull-down menu.
The Weight of Snow calculator takes in to account the area covered, the depth of the snow, and the type of snow (based on standard snow types). It computes the volume of snow and then uses the mean density of the specified type of snow (see table) to compute the mass.
M = A • d • ρ
where:
Type of snow or ice | (kg/m3) |
Fresh New snow | 50-70 |
Damp new snow | 100-200 |
Settled snow | 200-300 |
Depth hoar | 100-300 |
Wind packed snow | 350-400 |
Firn (granular) | 400-830 |
Very wet | 700-800 |
Glacier ice | 830-917 |
Rain/Melt | 997 |