The short answer

For a 400 sq ft embedded electric driveway running at the published 41–50.09 W/sq ft, our per-storm cost works out to roughly $4–$10 depending on zone and storm size, and the seasonal floor lands between about $70 and $227 depending on snowfall totals and the local EIA rate. Those numbers come from two published inputs — NOAA/ECCC snowfall normals and a manufacturer’s claimed 2 in/hr melt rate — multiplied by the January 2026 EIA residential rate for that zone. Nothing here is installed cost; that’s a separate page. This is what the electricity meter sees once the system is in the ground.

The method: MeltGauge, in one sentence

We take a zone’s average annual snowfall (NOAA 1991–2020 normals in the US, ECCC 1981–2010 normals in Canada), divide by a melt rate manufacturers claim of 2 in/hr, and multiply the resulting running hours by watts per square foot and the zone’s electricity rate. Two sourced inputs — snowfall and the rate — carry the whole answer, and we show both rather than folding them into an unsourced verdict.

The wattage side is published, not guessed: across the seven embedded-cable records we track, ThermoSoft’s NeverFreeze line runs 41–48 W/sq ft and WarmlyYours’ snow-melting mats run 50–50.09 W/sq ft, each read off the manufacturer’s own product page. We carry the full 41–50.09 W/sq ft range rather than picking a midpoint, because a single number here would be false precision the sources don’t support.

The 2 in/hr figure is marketing copy, not a measurement

Every mat and cable manufacturer on the market claims roughly 2 in/hr of melt capacity. It is not an independent lab result — nobody at SnowWatt has run a stopwatch on a driveway — and it is the same figure across brands, which is itself a tell that it is a category-standard marketing claim rather than a measured differentiator. Every hours figure below is snowfall divided by that number. If 2 in/hr overstates real capacity in heavy, wet, or wind-driven snow, every hour figure downstream understates the true runtime, and every dollar figure understates the true bill. We are not aware of a manufacturer that publishes a verified, third-party-tested melt rate, so this caveat does not have a fix — only a flag.

Per-storm and per-season cost, four zones on file

We ran the arithmetic for a 400 sq ft driveway (the same footprint WarmlyYours uses for its own runtime figure, so the comparison below lines up) across four zones with both snowfall data and a resolved electricity rate.

Great Lakes Snowbelt (Buffalo, NY reference station, 94.7 in/year, 25.5 days/year ≥1 in — NOAA 1991–2020): average storm size, derived as annual snowfall divided by event days, is 94.7 ÷ 25.5 ≈ 3.7 in, giving roughly 1.9 hours of runtime per storm at 2 in/hr. At $0.2042/kWh (EIA January 2026, MI/NY/OH/IN average), that’s about $6–$8 per storm and roughly $159–$194 for a full season of 47 running hours (94.7 ÷ 2).

Interior New England (Burlington, VT reference station, 81.2 in/year, 22.9 days/year ≥1 in): average storm size 81.2 ÷ 22.9 ≈ 3.5 in, about 1.8 hours per storm. At $0.2788/kWh (EIA January 2026, VT/NH/ME/MA average — the highest rate on file alongside coastal New England), that’s roughly $8–$10 per storm and about $186–$227 across a 40.6-hour season (81.2 ÷ 2).

Upper Midwest (Minneapolis–St. Paul reference station, 54.4 in/year, 16 days/year ≥1 in): average storm size 54.4 ÷ 16 = 3.4 in, about 1.7 hours per storm. At $0.1559/kWh (EIA January 2026, MN/WI/IA/IL average), that’s roughly $4–$5 per storm and about $70–$85 across a 27.2-hour season (54.4 ÷ 2) — the cheapest of the four zones on both counts, mostly on the strength of a lower rate and fewer inches.

Atlantic Canada (Halifax Stanfield, 87.1 in/year, ECCC 1981–2010 normals): running hours come to 43.55 (87.1 ÷ 2), but we cannot price it. Event-day counts here use a 5 cm threshold rather than the US 1 in threshold, so an average storm size isn’t comparable to the other three zones without converting units we haven’t converted. That’s a separate problem from the dollar figure, which is missing entirely — see below.

Why the season total is a floor, not a forecast

Every one of those season figures assumes the system runs exactly as long as the melt-rate arithmetic says and not one minute more — no preheat cycle ahead of a forecast storm, no idle running while a sensor waits to confirm snow has stopped, no partial coverage where a controller keeps a zone warm through a lull. Real installations are typically sensor-controlled and will cycle in ways this arithmetic doesn’t capture. That means the numbers above are a lower bound on what a January electric bill will show, not a point estimate of it.

Why Atlantic Canada has no dollar figure

The Nova Scotia Power 2026 tariff book states a Domestic Service energy charge of 18.324 cents/kWh; Nova Scotia Power’s own rate-change page states 19.128 cents/kWh effective 2026-05-01. Neither of those is the all-in price, either — both sit under a Fuel Adjustment Mechanism and a DSM Cost Recovery rider that aren’t broken out in either document. Rather than average two disagreeing partial figures and call it a rate, we leave the field null. Halifax gets 87.1 in of snow a year and 13.9 days over 5 cm — snowbelt-grade totals — and we simply do not have a defensible cost to attach to them yet.

A second number that doesn’t agree with ours, on purpose

WarmlyYours, for its own 400 sq ft two-car driveway system at 50 W/sq ft, publishes 50–120 hours of seasonal runtime and 10–20 storms per season. That is a manufacturer’s figure for its own product category, not a disinterested measurement, and we are not reconciling it with the MeltGauge hours above. Put side by side: Great Lakes’ 47 hours sits just under WarmlyYours’ 50-hour floor; New England Interior’s 40.6 hours and Upper Midwest’s 27.2 hours sit well under it. On storm count, only the Upper Midwest’s 16 storms/season falls inside WarmlyYours’ 10–20 range — the other two zones run more frequent, smaller events than that range describes. Two sourced numbers, two different pictures of the same job; we show both rather than pick a winner.

For a specific driveway size, wattage band, and zone, the storm cost calculator runs this same arithmetic and shows its inputs rather than a single blended answer.

Who this arithmetic is not for

Anyone in a heavy lake-effect corridor — Syracuse’s 123.8 in/year and 34.5 days ≥1 in are on file for the Great Lakes zone, well above the 94.7 in Buffalo average we used above — should treat these hours as optimistic, not conservative; we do not have a sourced figure for typical storm intensity in that corridor and are not willing to publish a “keeps up” or “falls behind” verdict without one. Anyone in Atlantic Canada gets snowfall data but no cost, for the reasons above, until Nova Scotia Power’s own documents agree with each other. And anyone budgeting to a single number rather than a range should treat every dollar figure here as a floor: two genuine gaps — an unverified melt-rate claim and a continuous-running assumption with no preheat or idle time built in — both push in the same direction, toward under-stating the real bill, not over-stating it.

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