Sauna running cost calculator
Operating cost is heater power times session length times your electricity rate. The calculator below uses your state's actual May 2026 residential rate from the U.S. Energy Information Administration; a reference table at the national average rate of 18.44 cents per kWh follows it.
Your cost
- Cost per session
- $1.11
- Cost per month
- $13.28
Heater draw during a session cycles on and off around the set temperature, so real usage often lands somewhat below this straight-line estimate; treat it as the upper bound.
Common heater power at a glance
| Heater power | Cost per session | 12 sessions per month |
|---|---|---|
| 3 kW | $0.55 | $6.64 |
| 4.5 kW | $0.83 | $9.96 |
| 6 kW | $1.11 | $13.28 |
| 8 kW | $1.48 | $17.70 |
| 9 kW | $1.66 | $19.92 |
Prices and specifications verified July 25, 2026, and re-checked weekly after that. How these numbers are checked.
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