Weight Is the Real Enemy

Shoveling time and effort are driven almost entirely by how much the snow weighs, which depends on its density. Fresh powder weighs about 5 lb per cubic foot, packed snow roughly 12 lb, and wet spring snow up to 20 lb. Six inches over a 500 sq ft driveway is 1,250 lb of light snow — or 5,000 lb if it is wet. The calculator computes the volume first, applies the density, and then converts weight into time and calories.

Time From a Rate, Calories From a MET

An average adult clears snow at roughly 1.6 lb per minute at a moderate pace and 2.4 lb/min when working hard. Time is weight divided by that rate. Calories follow the standard MET equation — kcal = MET × 3.5 × body weight (kg) ÷ 200 × minutes — with shoveling rated at MET 5.0 to 6.5, comparable to a brisk uphill walk.

Treat It Like Exercise, Because It Is

Clearing a deep, wet driveway is a genuine cardiovascular workout — and a well-documented trigger for cardiac events in cold weather, when blood vessels constrict and sudden exertion spikes heart rate and blood pressure. Warm up, push snow instead of lifting it when you can, take breaks, and pace yourself. The calorie figure is a reminder of how hard the task actually is.