The Running Cost Formula
Running cost is calculated with a simple formula: (Wattage ÷ 1000) × Hours Used × Electricity Rate ($/kWh) = Cost in dollars. A 1,800W sauna used for 45 minutes (0.75 hours) at the U.S. average rate of $0.17/kWh costs approximately $0.23 per session. The same formula scales to weekly, monthly, and annual totals by multiplying by your session frequency.
Electricity billing is based on kilowatt-hours (kWh) — the amount of energy a 1,000-watt device uses if run for one hour. Every appliance, including your sauna, draws a certain wattage while operating. To find the cost of a single session, convert wattage to kilowatts, multiply by the number of hours the unit runs, and multiply again by your electricity rate in dollars per kWh.
For example, a sauna blanket rated at 600W used for a 45-minute session draws 0.6kW × 0.75 hours = 0.45 kWh. At the national average residential rate of roughly $0.17 per kWh, that session costs about $0.077 — well under a dime. Scale that up to a 1,800W full-cabin infrared sauna and the same 45-minute session costs around $0.23. Even at three sessions a week, that's under $3 per month.
Understanding Your Electricity Rate
The U.S. average residential electricity rate is approximately $0.17 per kWh, but state rates vary widely — from around $0.10/kWh in parts of the Pacific Northwest and South to over $0.30/kWh in California, Massachusetts, and Hawaii. Check a recent utility bill for your exact rate, usually listed as "price per kWh" or calculated by dividing your total electricity charge by the kWh used.
Because electricity rates vary by location and by time of year, the figures throughout this page use the U.S. average of $0.17/kWh as a baseline (U.S. Energy Information Administration). The calculator below lets you enter your own rate for a precise, personalised estimate.
Running Costs By Sauna Type
Sauna blankets are the cheapest to run, typically costing $0.08–$0.10 per session because their heating elements draw 600–700W. Full-size far-infrared cabins draw the most — up to 1,700W — but even at that wattage, a 45-minute session costs roughly $0.22, or under $3 per month at three sessions a week.
The table below estimates per-session and monthly running costs for five common infrared sauna formats, based on a 45-minute session, three sessions per week, and the U.S. average rate of $0.17/kWh. Actual wattage varies by model — always check the manufacturer's specification plate for your exact unit.
| Sauna Type | Typical Wattage | Cost Per 45-Min Session | Monthly Cost (3x/week) |
|---|---|---|---|
| Sauna Blanket (Budget) | 600W | $0.08 | $1.04 |
| Sauna Blanket (Premium) | 700W | $0.09 | $1.17 |
| Portable Sauna Dome / Tent (Single) | 1,100W | $0.14 | $1.82 |
| Sauna Tent (2-Person) | 1,350W | $0.17 | $2.21 |
| Full-Size Far Infrared Cabin | 1,700W | $0.22 | $2.87 |
Calculate Your Own Running Cost
Enter your sauna's wattage (found on its specification label), your typical session length, how many sessions you take per week, and your electricity rate from a recent utility bill. The calculator below applies the same formula used throughout this guide — (Wattage ÷ 1000) × Hours × Rate — to give you a personalised cost per session, week, month, and year.
Most sauna manufacturers list wattage on a rating plate near the power cord or in the product manual. If you can't find it, check the product listing — wattage is typically listed alongside voltage and amperage specifications.
Your annual running cost is about the same as 0 cups of coffee at $5.50 each.
Estimates only. Actual costs depend on your specific unit, ambient temperature, insulation, and utility rate structure (including time-of-use and tiered pricing).
Purchase Price vs. Running Cost: The Real Total
Running cost adds remarkably little to a sauna's total cost of ownership. Over five years of use at three 45-minute sessions per week, electricity adds roughly $60–$170 depending on the unit — typically 5–15% of the purchase price for budget units and under 10% for premium cabins. The purchase price, not the running cost, is overwhelmingly the dominant factor in total cost.
The table below shows five-year totals (purchase price + electricity at 3 sessions/week, 45 minutes, $0.17/kWh — approximately 780 sessions) for the products featured in our Best At-Home Sauna & Heat Therapy Products guide.
| Product | Purchase Price | 5-Year Running Cost | 5-Year Total |
|---|---|---|---|
| Durherm FAR IR Portable Sauna | $169 | $109.20 | $278.20 |
| Wizzisauna 2-Person Tent | $279 | $132.60 | $411.60 |
| LifePro RejuvaWrap Blanket | $399 | $62.40 | $461.40 |
| HigherDOSE Infrared Blanket | $699 | $70.20 | $769.20 |
| Relax Far Infrared Sauna | $1,700 | $171.60 | $1,871.60 |
Infrared vs. Traditional Sauna: Which Costs More to Run?
Yes — traditional Finnish electric sauna heaters typically draw 4,000–8,000W (often around 6kW), compared to 600–1,800W for infrared units. This makes a traditional sauna session roughly 5–8 times more expensive than an infrared session, because the heater must warm the air in the entire room rather than directing heat at the body.
Traditional saunas also require a longer preheat — often 30–45 minutes to reach 180°F–200°F — while infrared units typically reach operating temperature in 5–15 minutes. Both the higher wattage and the longer preheat compound to make traditional saunas notably more expensive to operate, even though sessions themselves are often shorter.
| Feature | Infrared Sauna | Traditional Finnish Sauna |
|---|---|---|
| Typical Heater Wattage | 600–1,800W | 4,000–8,000W |
| Preheat Time | 5–15 minutes | 30–45 minutes |
| Typical Session Length | 30–45 minutes | 15–20 minutes |
| Cost Per Session (@ $0.17/kWh) | $0.07–$0.25 | $0.85–$1.50 |
| Monthly Cost (3x/week) | ~$1–$3 | ~$11–$20 |
| Electrical Requirement | Standard 120V outlet | Often dedicated 240V circuit |
Electrical Requirements: Do You Need a Dedicated Circuit?
Most infrared sauna blankets, domes, and tents draw under 1,500W and plug into a standard 120V/15-amp household outlet — no electrician or dedicated circuit required. Full-size cabins in the 1,700W–2,000W range still generally run on a standard outlet but should not share that circuit with other high-draw appliances (microwaves, space heaters, hair dryers) to avoid tripping a breaker. Traditional 6kW+ sauna heaters almost always require a dedicated 240V circuit installed by a licensed electrician.
If you're shopping for an infrared sauna and renting, or simply want to avoid electrical work, this is one of the clearest practical advantages: nearly every product in our best sauna products guide can be plugged in and used the same day it arrives.
Total Cost of Ownership Over 5 Years
Over five years at three 45-minute sessions per week, total electricity cost for an infrared sauna ranges from roughly $60 (sauna blanket) to $170 (full cabin) — on top of the purchase price. There are no recurring costs comparable to a gym membership or spa visits; the unit is the cost, plus a small, predictable electricity line item.
Because infrared heating elements have no moving parts and very long rated lifespans (often 10,000+ hours of use — decades at typical home usage), the electricity cost stays essentially flat for the life of the product. The main variable over five years is your local electricity rate, which has historically risen 2–4% per year nationally — a difference of a few dollars annually for most units.
Maintenance & Replacement Costs
Infrared saunas have minimal ongoing costs beyond electricity. Expect to spend roughly $15–$30 per year on cleaning supplies (towels, antibacterial wipes, or a liner for blankets). Heating elements in quality units are rated for 10,000+ hours — well beyond a typical 5-year ownership window at normal usage — so element replacement is rarely a factor. Sauna tents and domes may need occasional zipper or seam repairs after years of folding and storage.
Unlike gym equipment with belts, motors, or filters, infrared heating panels are largely maintenance-free. The most common "wear" item across all five products in our guide is the included accessories — liners, pillows, or chair cushions — which are inexpensive to replace if needed.
The 200 Rule and Why Traditional Saunas Cost More to Run
The 200 rule — air temperature (°F) plus relative humidity (%) should equal or exceed 200 for an authentic Finnish sauna — requires heating an entire room's volume of air to 180–200°F and maintaining it through repeated steam ladling. This is fundamentally more energy-intensive than infrared heating, which targets the body directly and allows the surrounding air to remain at a much lower 120–150°F.
This is the core reason infrared saunas are dramatically cheaper to run: they sidestep the 200-rule heating model entirely. Rather than heating thousands of cubic feet of air and continuously replenishing heat lost through steam and ventilation, infrared panels emit energy that's absorbed directly by skin and tissue. The room itself stays relatively cool, which is also why infrared units require far less insulation and no special ventilation.
Is It Worth It? Putting the Cost in Perspective
At $1–$3 per month for most infrared units, running cost is negligible compared to almost any other wellness expense — a single boutique gym class, infrared sauna studio visit, or massage session typically costs $20–$60. A home sauna used three times a week for a year costs less in electricity than a single month of an average gym membership, while providing unlimited sessions on your own schedule.
Sauna studios and spas commonly charge $20–$45 per infrared session. At that rate, three sessions a week would cost $260–$585 per month — compared to $1–$3 in electricity for an at-home unit. Even after accounting for the upfront purchase price, most home infrared saunas pay for themselves in studio-visit savings within one to three months of regular use.
Ready to Choose Your Sauna?
See our full breakdown of five Amazon-verified infrared sauna products — from $169 portable units to full-size far-infrared cabins — with independent spec verification and a profile-based recommendation system.
View Best Sauna Picks → ⚠ Not medical advice. Some links on this site are Amazon affiliate links and we may receive a commission on qualifying purchases at no additional cost to you. See full disclosure below.Common Questions Answered
How much does it cost to run an infrared sauna per session?
Most at-home infrared saunas cost between $0.07 and $0.30 per 45-minute session, depending on the unit's wattage and your local electricity rate. A typical sauna blanket (600–700W) costs around $0.08 per session, while a full-size far-infrared cabin (1,500–1,800W) costs closer to $0.20–$0.25.
Is an infrared sauna expensive to run monthly?
No. At three 45-minute sessions per week and the U.S. average electricity rate of $0.17 per kWh, most infrared saunas and blankets cost between $1 and $3 per month to run. Even daily use rarely exceeds $8–$10 per month for a full-size unit.
Do infrared saunas need a special electrical outlet?
Most infrared sauna blankets, portable domes, and tents draw under 1,500W and run on a standard 120V household outlet with no special wiring. Larger full-cabin units in the 1,700W–2,000W range still typically run on a standard outlet, but should not share a circuit with other high-draw appliances.
How much electricity does a traditional sauna use compared to infrared?
Traditional Finnish sauna heaters typically draw 4,000–8,000W (commonly around 6kW) versus 600–1,800W for infrared units. A traditional sauna session can cost roughly $0.85–$1.50 in electricity, compared to $0.07–$0.25 for infrared — largely because traditional heaters must raise the temperature of the entire room's air, not just the body.
Will running a sauna significantly increase my electric bill?
For most infrared sauna owners, the answer is no. At typical usage (3 sessions per week), the added cost is comparable to leaving a few LED lights on for an extra hour each day — usually $1–$3 per month. Traditional electric sauna heaters used several times per week can add $10–$20 per month, which is still modest compared to most home appliances.