Snow Depth to Water Equivalent
Convert snow depth to liquid water equivalent and estimate the weight of snow on a roof, free online.
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The snow-to-liquid ratio (SLR) depends on temperature and wetness: heavy wet snow ≈ 6:1, average 10:1, light dry powder 15–20:1. Water equivalent = depth ÷ SLR. Snow weight on a roof ≈ water equivalent (mm) kg per m² (1 mm of water on 1 m² = 1 kg).