How Much Does It Cost to Run a Home Sauna? (2026 Electricity Cost Guide)

Disclosure: Cold & Ember is reader-supported. If you buy through some links on this site, we may earn a commission at no extra cost to you. This is a research-based guide: we have not personally tested the heaters or saunas mentioned. Heater ratings come from the manufacturers’ own spec pages, and electricity prices come from the U.S. Energy Information Administration (EIA). The session costs below are worked examples built from those figures, not measurements.

A home sauna usually costs far less to run than most people expect. Still, “far less” isn’t a number, and your bill depends on three things you can actually look up: how many kilowatts your heater draws, how long it runs, and what your utility charges per kilowatt-hour. This guide walks through the math with real heater ratings and current electricity prices, so you can estimate your own cost per session, per month and per year before you buy.

The quick answer

At the U.S. average residential electricity price of 18.16 cents per kWh (EIA, August 2026), a typical 6 kW traditional sauna heater costs roughly $1.09 per hour at full power. A 1,350 to 2,260 watt infrared cabin costs roughly 25 to 41 cents per hour at full draw. Because a thermostat cycles the heater off once the room is hot, these are ceiling figures; your real cost per session should usually come in lower.

How to calculate sauna running cost

The formula is simple:

Heater power (kW) × hours running × electricity price ($ per kWh) = cost

Heater power: printed on the heater’s spec sheet or label. Traditional heaters are rated in kilowatts (kW). Infrared saunas usually list watts; divide by 1,000 to get kW.
Hours running: warm-up time plus the time you actually sit in the sauna. Count both, because the heater works hardest while it is bringing a cold room up to temperature.
Electricity price: look at the “per kWh” line on your utility bill. If you are on a time-of-use plan, use the rate for the hours you plan to sauna.

The result is an upper bound. Rated power is the maximum the heater draws. Once the room reaches your set temperature, the thermostat switches the elements on and off to hold it there, so the average draw during the bathing part of a session is lower than the rating. How much lower depends on insulation, room size, outdoor temperature and how often the door opens, so we don’t put a single percentage on it.

Real heater ratings, real cost per hour

Here are published power ratings for several popular heaters and infrared cabins, with the cost of one hour at full rated power at the August 2026 U.S. average residential price.

Heater or sauna	Type	Rated power	Room size (maker’s range)	Cost per hour at full power
HUUM DROP 4	Traditional, electric	4.5 kW (240V)	3 to 7 m³	$0.82
HUUM DROP 6	Traditional, electric	6 kW (240V)	5 to 9 m³	$1.09
Harvia Cilindro PC70XE	Traditional, electric	6.8 kW	212 to 353 ft³	$1.23
HUUM DROP 7	Traditional, electric	7.5 kW (240V)	7 to 11 m³	$1.36
Harvia Cilindro PC90	Traditional, electric	9 kW	8 to 14 m³	$1.63
Sunlighten Signature I	Infrared, 1 person	1,350 W (120V)	Cabin	$0.25
Clearlight Premier IS-2	Infrared, 2 person	1,720 W (120V)	Cabin	$0.31
Clearlight Sanctuary 2	Full-spectrum infrared, 2 person	2,260 W (120V)	Cabin	$0.41

Sources: manufacturer spec pages linked at the end of this article. Cost per hour = rated kW × $0.1816, rounded to the nearest cent.

Worked example: cost per session

To turn hourly cost into a session cost, you need an assumption about run time. The numbers below use an example session, not a measured one:

Traditional sauna: 45 minutes of warm-up plus 30 minutes of use = 1.25 hours of heater time.
Infrared cabin: 15 minutes of warm-up plus 30 minutes of use = 0.75 hours.

We also assume full rated power the whole time, which overstates the real cost. Your warm-up time will differ, so check your heater manual and your own experience, then plug in your numbers.

Setup	Energy per session (upper bound)	Cost per session	3 sessions a week, per month (13 sessions)	Per year (156 sessions)
4.5 kW heater	5.6 kWh	$1.02	$13.28	$159.35
6 kW heater	7.5 kWh	$1.36	$17.71	$212.47
9 kW heater	11.25 kWh	$2.04	$26.56	$318.71
1,350 W infrared	1.0 kWh	$0.18	$2.39	$28.68
2,260 W infrared	1.7 kWh	$0.31	$4.00	$48.02

So even at the upper bound, a mid-size traditional sauna used three times a week lands under about $20 a month at the national average rate. Infrared cabins, which run at a lower air temperature and draw far less power, cost a fraction of that.

Your state matters more than your heater

Electricity prices vary widely across the U.S. The EIA’s August 2026 figures show average residential prices ranging from about 12.7 cents per kWh in Nevada to 29.75 cents in California and 47.18 cents in Hawaii. Here is the same 6 kW, 1.25-hour example session at different rates:

Location (EIA residential average, Aug 2026)	Price per kWh	6 kW session (7.5 kWh)	13 sessions a month
Nevada	12.72¢	$0.95	$12.40
Texas	15.91¢	$1.19	$15.51
U.S. average	18.16¢	$1.36	$17.71
Michigan	22.99¢	$1.72	$22.42
New York	28.65¢	$2.15	$27.93
California	29.75¢	$2.23	$29.01
Hawaii	47.18¢	$3.54	$46.00

State averages hide a lot of variation between utilities and plans, so your own bill is always the best number to use.

Traditional vs infrared: running cost pros and cons

Traditional electric sauna

Pros

Delivers the classic hot-air sauna with steam (löyly) from water on the stones.
Running cost is still modest at average electricity prices.
Heaters are sized to the room, so a small, well-insulated room keeps the heater and the bill smaller.

Cons

Draws several times more power than an infrared cabin.
Needs warm-up time, which you pay for before you sit down.
Usually needs a dedicated 240V circuit installed by an electrician, which is an upfront cost on top of running costs.

Infrared sauna

Pros

Much lower power draw; many cabins run on 120V household circuits.
The cabins in our table use 120V power, so installation is often simpler than a 240V heater.

Cons

A different experience: lower air temperatures and no traditional steam.
Some models still require a dedicated 20A circuit, so check the spec sheet.

Seven ways to lower your sauna running cost

Size the heater correctly. An oversized heater draws more power than you need. Use the manufacturer’s room-volume chart, and see our guide on how to size a sauna heater.
Insulate well. Insulated walls and ceiling hold heat, so the thermostat cycles the elements less. This matters most outdoors; our cold-climate outdoor sauna guide covers what to look for.
Watch the glass. Large glass panels lose more heat than insulated walls, and makers often recommend a bigger heater for glass-heavy rooms.
Keep the door closed during warm-up. Every opening dumps hot air.
Use a timer or app. Wi-Fi controls such as HUUM’s UKU or the MyHarvia app (with the required kit) let you start the heater so it is ready when you are, instead of running “just in case.”
Check time-of-use rates. If your utility charges less at certain hours, scheduling sessions then can cut the cost per session.
Back-to-back sessions. Once the room and stones are hot, a second person’s session costs much less than the first, because there is no warm-up to pay for.

Buying criteria if running cost matters to you

Rated power vs room volume: pick the smallest heater the manufacturer approves for your room, adjusted for glass and climate.
Indoor or outdoor placement: an indoor sauna starts from room temperature, while an outdoor one starts from outside air in winter. See indoor vs outdoor sauna for the trade-offs.
Building shape and insulation: barrel and cabin designs handle heat differently; compare them in barrel sauna vs cabin sauna.
Electrical requirements: voltage, breaker size and wire gauge affect your installation cost. For example, HUUM lists a 30A breaker for the 240V DROP 6 and a 50A breaker for the DROP 9.
Controls: a reliable thermostat, timer and remote start make it easier not to waste heat.
Heater type: traditional for heat and steam, infrared for low power draw. Wood-burning heaters avoid electricity entirely, but firewood cost depends so much on your area that we don’t estimate it here.

Frequently asked questions

How much does it cost to run a sauna for an hour?

Multiply the heater’s kW rating by your electricity price. At the August 2026 U.S. average of 18.16 cents per kWh, a 6 kW heater costs about $1.09 per hour at full power, and a 9 kW heater about $1.63. Thermostat cycling usually brings the real cost below that.

Does a sauna use a lot of electricity?

A traditional sauna heater draws a lot of power while it is on, often 4.5 to 9 kW for home models. But because sessions are short, the monthly total is modest for most people. In our example, three 6 kW sessions a week came to under $18 a month at the average U.S. rate.

Is an infrared sauna cheaper to run than a traditional sauna?

Generally yes. The infrared cabins in our table are rated between 1,350 and 2,260 watts, a fraction of a traditional heater’s draw.

Does running a sauna in winter cost more?

For outdoor saunas, often yes, because the room starts colder and loses heat faster to the outside air. That means longer warm-up and more thermostat cycling. Good insulation and correct heater sizing help most.

Will a sauna raise my electric bill a lot?

It depends on your rate and how often you use it. In our example, three 6 kW sessions a week ranged from about $12 a month in Nevada to about $46 in Hawaii at full-power, upper-bound math. Use the formula in this guide with your own kWh rate and planned sessions to get a realistic number before you buy.

Is a 120V sauna cheaper to run than a 240V sauna?

Voltage itself doesn’t set the cost; power (kW) and run time do. 120V saunas are usually low-power infrared cabins, which is why they cost less to run.

Is a sauna safe for everyone?

No. Talk to a doctor before using a sauna if you have heart or blood pressure problems, are pregnant, or take medication. Avoid alcohol, stay hydrated and never leave children unsupervised.

The bottom line

For most U.S. homes, a traditional electric sauna costs a dollar or two per session, and an infrared cabin costs well under 50 cents, even using conservative full-power math. Where you live changes the number more than which brand you buy. Grab your utility bill, check the heater’s kW rating, and run the formula. Then put the money you save on guesswork toward good insulation and a correctly sized heater, which keep the bill low for years.