Enter your sauna’s power, how long and often you use it, and your electricity rate to see the real cost per session and over a year.
Add up the wattage on all panels and divide by 1000. A typical 1-2 person cabin is around 1.5 to 1.8 kW.
Editable. Check the latest figure on your energy bill. The default is a rough UK average and is not a quoted price.
Most infrared panels run at or near full power the whole session, so 100% is a fair default. Lower it if your unit cycles on and off.
Cost per session
£0.00
£0.00
Energy per session: 0 kWh
Per week: £0.00
Per month: £0.00
Per year: £0.00
How this works
Cost per session = heater power (kW) × session length (in hours) × the average power draw × your unit rate. For example, a 1.6 kW cabin run for 40 minutes uses 1.6 × 0.667 = 1.07 kWh, which at 24.5p is about 26p.
Weekly cost multiplies that by your sessions per week. Monthly uses 4.33 weeks and yearly uses 52 weeks, so the figures match across the year.
Assumptions: this counts the heater only. It ignores the small standby draw of controls and any lighting, which together add a few pence at most. Standing charges are billed whether or not you use the sauna, so they are not included here.