Sauna Electricity Costs: How Much Does It Actually Cost to Run?
One of the most common questions from prospective sauna owners: "How much will this add to my electric bill?" The short answer is probably less than you're expecting. The long answer depends on your heater size, session habits, and local electricity rates.
Quick Answers
How much does it cost to run a sauna?
It depends on heater size, session length, and your electricity rate, but most home saunas cost well under a dollar per session. A 6kW traditional sauna runs about $0.96 to $1.44 per session, while a 1.5-3kW infrared sauna runs about $0.29 to $0.48, using the U.S. average rate of $0.16 per kWh.
What is the formula for calculating sauna electricity cost?
Cost per session equals heater kW multiplied by hours of operation multiplied by your electricity rate per kWh. For example, a 6kW heater run for one hour at $0.16 per kWh costs about $0.96. Actual cost is often lower since the heater cycles on and off once it reaches temperature.
Is an infrared sauna cheaper to run than a traditional sauna?
Yes. Infrared heaters use 1.5-3 kW compared to 6-9 kW for traditional electric heaters, so a typical session costs about $0.29 to $0.48 versus $0.96 to $1.44 for a traditional sauna, based on the U.S. average electricity rate of $0.16 per kWh.
How much does a cold plunge chiller add to electricity bills?
Cold plunge chillers draw 0.5-1.5 kW and cycle on and off to hold temperature, typically costing $0.50 to $2.00 per day depending on ambient temperature and how well the unit is insulated.
Does location affect how much a sauna costs to run?
Yes, local electricity rates make a big difference. California rates around $0.30 per kWh roughly double the national average cost, while states like Louisiana at about $0.10 per kWh cost much less to run the same sauna.
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The Quick Formula
Cost per session = (heater kW) x (hours of operation) x (electricity rate per kWh)
The U.S. average electricity rate is roughly $0.16 per kWh (as of early 2026), though this varies significantly by state.
Cost by Heater Type
Traditional Electric Sauna (6-9 kW heater)
- Heat-up time: 30-45 minutes
- Session length: 20-30 minutes
- Total run time: ~1 hour per session (including heat-up)
- Cost per session (6kW): 6 x 1 x $0.16 = $0.96
- Cost per session (9kW): 9 x 1 x $0.16 = $1.44
Note: The heater doesn't run at full power the entire time. Once the sauna reaches temperature, it cycles on and off. Actual consumption is typically 60-80% of the theoretical maximum.
Infrared Sauna (1.5-3 kW)
- Heat-up time: 10-20 minutes
- Session length: 30-45 minutes
- Total run time: ~1 hour
- Cost per session (1.8kW): 1.8 x 1 x $0.16 = $0.29
- Cost per session (3kW): 3 x 1 x $0.16 = $0.48
Cold Plunge with Chiller
- Chillers draw 0.5-1.5 kW and run intermittently to maintain temperature
- Daily cost: typically $0.50-2.00 depending on ambient temperature and insulation
Monthly and Annual Estimates
For a typical 6kW traditional sauna used 4 times per week:
- Per session: ~$0.80 (accounting for cycling)
- Monthly (16 sessions): ~$13
- Annual: ~$155
For a 1.8kW infrared sauna used 5 times per week:
- Per session: ~$0.25
- Monthly (20 sessions): ~$5
- Annual: ~$60
Factors That Affect Cost
- Local electricity rates: California at $0.30/kWh costs roughly double the national average. States like Louisiana at $0.10/kWh cost much less.
- Insulation quality: A well-insulated sauna heats faster and cycles less, reducing consumption
- Climate: Outdoor saunas in cold climates use more energy to maintain temperature
- Session length: Longer sessions cost more, but the difference is modest since the heater is cycling once at temperature
- Heater sizing: A properly sized heater is more efficient than an undersized one that runs constantly
Putting It in Perspective
Running a sauna 4 times a week costs roughly the same as a single coffee shop visit per week. It's less than most streaming subscriptions. And it's a fraction of what you'd pay for gym or spa sauna access.
Related Terms
- Kilowatt Ratings for Heaters
- Sauna Return on Investment
- Sauna Ownership vs. Spa Membership
- 240V Circuit for Saunas
Affordable to Own, Affordable to Run
Browse our outdoor saunas and indoor saunas and check the heater specs on each product page. We list kW ratings so you can calculate your exact operating cost before you buy.
How to Use This Guide
Use this guide as a practical starting point, then confirm product specifications, installation requirements, electrical needs, water care steps, and medical considerations with the appropriate professional before making a final decision.
Where SweatDecks Can Help
SweatDecks helps shoppers compare saunas, cold plunges, heaters, accessories, delivery requirements, and setup considerations so the finished wellness space is easier to buy, install, and maintain.
Practical Buying Context
When comparing sauna, cold plunge, heater, steam, or accessory options, review the product specifications, installation manual, warranty terms, delivery requirements, maintenance routine, and compatibility details before choosing a model. The right answer often depends on available space, power, plumbing, climate, budget, and who will use the setup.
When to Get Professional Help
Use qualified professionals for electrical work, plumbing, structural support, ventilation, medical questions, and local code requirements. SweatDecks can help with product research and planning questions, but final installation and safety decisions should match the manufacturer instructions and applicable local requirements.
Decision Checklist
Before acting on this topic, compare the relevant product specifications, space requirements, care routine, warranty terms, replacement parts, and installation constraints. For health, electrical, plumbing, structural, or code questions, confirm details with the appropriate qualified professional.
Related SweatDecks Research Paths
Most sauna and cold plunge decisions connect to a few core questions: how much space you have, how often the setup will be used, what maintenance feels realistic, and whether the product fits your budget, climate, delivery path, and long-term wellness routine.
Browse our expert-tested cold plunge collection.
