Best Heated Snow Melting Mats for Stairs: Sizes, Amps and Cost to Run

Four heated stair mats draw about 2.8 amps, roughly 6 cents an hour. Sizes, amps per outlet, cost to run, safety rules, five picks.

11/5/20263 min read

Curb Calc cover: Heated Snow Melting Mats, a table of amps and watts for 10 x 30 and 10 x 48 stair mats, with a night photo of snowy steps by a lit doorCurb Calc cover: Heated Snow Melting Mats, a table of amps and watts for 10 x 30 and 10 x 48 stair mats, with a night photo of snowy steps by a lit door

Four front steps, an inch of fresh snow on each, and someone has to get down them before 7 a.m. Heated stair mats melt it as it falls, and four HeatTrak 10 x 30 stair mats draw 2.8 amps, by HeatTrak's numbers. That's about 6 cents an hour.

Quick pick: HeatTrak 10 x 30 stair mats, one per step, plus the HR-P Power Unit they need. Wide steps: the 10 x 48 size.

Free calculator: HeatTrak says not to lay mats on dirt or gravel. Paving that landing? Get pavers and base in our free paver calculator. No sign-up.

Snow falling at night on a brick building with a lit doorway and snow-covered steps with a metal railing
Snow falling at night on a brick building with a lit doorway and snow-covered steps with a metal railing

Photo: Britt Fowler on Unsplash

Which size fits your steps

Measure each tread: depth front to back, then width.

10 x 30 stair mat: treads at least 10 inches deep. It covers the middle 30 inches.

10 x 48 stair mat: wider steps. 1 amp each, per the listing.

20 x 30 walkway mat: the landing and the walk.

Power: every group of mats needs one HR-P Power Unit, HeatTrak's manual says. The 20 x 30 walkway mat is also sold with one included.

Close-up of wooden deck steps dusted with snow beside gray siding
Close-up of wooden deck steps dusted with snow beside gray siding

Photo: Clay LeConey on Unsplash

How many mats per outlet

Add the amps: the manual says to total the amp labels by each mat's plug. A 10 x 30 stair mat is 0.7 A; a 20 x 60 walkway mat is 2.5 A.

The limit: the Power Unit listing says up to 13 amps. The manual's examples: eighteen 10 x 30 mats (12.6 A), or five 20 x 60 mats.

Outlet far away: the manual allows outdoor extension cords rated at least 15 amps. HeatTrak also sells watertight extenders.

Granite steps with a light layer of snow and footprints
Granite steps with a light layer of snow and footprints

Photo: Ahmed Nishaath on Unsplash

What they cost to run

Watts = amps x 120 volts: 84 W per 10 x 30 mat, 120 W per 10 x 48.

At the U.S. average: homes paid 18.16 cents per kWh in August 2026 (EIA). A 10 x 30 mat costs about 1.5 cents an hour.

The four-step set: about 6 cents an hour, or $1.46 for a full 24-hour storm day.

Melt rate: 2 inches an hour, per the listings, and the walkway listings say they work down to -8°F.

Wide outdoor stairs covered in snow with metal handrails and street lamps
Wide outdoor stairs covered in snow with metal handrails and street lamps

Photo: Pourya Gohari on Unsplash

Setup and safety

Clear first: the manual says to clear existing ice and snow before you lay the mats.

Test the GFCI: the Power Unit has one built in. Test it after you install and before each season.

Grounded outlet: use a properly grounded outdoor outlet; the manual says to have an electrician put one next to the mats.

Never cover them. Also no indoor use, no large pets, no pet houses, per the manual.

Fasten through the corner grommets only: no nails or screws through the rubber.

Sealed or stained concrete: the manual warns the heat can discolor the sealer; put a thin layer of insulation under the mats.

Spring: store them indoors after winter.

Not a fit: dirt or gravel walks (HeatTrak says no), a whole driveway, or storms that drop more than 2 inches an hour, which outrun the 2-inch melt rate. For those, see how much ice melt you need. Dog in the house? Read pet-safe ice melt.

Stone steps dusted with snow on a park path lined with snow-covered evergreens
Stone steps dusted with snow on a park path lined with snow-covered evergreens

Photo: İsmail Efe Top on Unsplash

Heated snow melting mats (#ad)

As an Amazon Associate, Curb Calc earns from qualifying purchases.

HeatTrak HR-P Power Unit: required for HeatTrak stair and walkway mats. Up to 13 A, built-in GFCI, 6 ft cord, per the listing. See it on Amazon

HeatTrak 10 x 30 Stair Mat: 0.7 A, Power Unit sold separately, per the listing. See it on Amazon

HeatTrak 10 x 48 Stair Mat: 1 A, for wider steps, per the listing. See it on Amazon

HeatTrak 20 x 30 Walkway Mat with Power Unit: the first mat in a set, ready to plug in, per the listing. See it on Amazon

HeatTrak 20 x 30 Walkway Mat: for a landing, Power Unit sold separately, per the listing. See it on Amazon

Heated mat FAQ

Do heated snow melting mats work?

HeatTrak lists 2 inches of snow an hour, down to -8°F for its walkway mats. Clear old ice before you lay them.

How much does a heated stair mat cost to run?

About 1.5 cents an hour for a 10 x 30 mat at the U.S. average rate.

Can heated mats go on gravel?

No. HeatTrak's manual says not to install them on rough dirt or gravel.

Watch Curb Calc on YouTube: youtube.com/@curbcalc

Sources: HeatTrak Residential Products Instruction Manual; EIA Table 5.6.A.