One hour at full power
| Type | Heater power | One hour at full power |
|---|---|---|
| Sauna (per hour of use) | 2.6 kW | £0.68 |
| Sauna (per hour of use) | 4.62 kW | £1.22 |
| Sauna (per hour of use) | 9 kW | £2.37 |
| Hot tub (per hour of heating) | 2 kW | £0.53 |
| Hot tub (per hour of heating) | 3 kW | £0.79 |
| Cold plunge (per hour of cooling) | 0.5 kW | £0.13 |
| Cold plunge (per hour of cooling) | 0.6 kW | £0.16 |
| Cold plunge (per hour of cooling) | 0.82 kW | £0.22 |
The power steps are the lower quarter, median and upper quarter (equal values appear once) of the heater power stated in 75 saunas, 64 hot tubs, 5 cold plunges. Hot tubs on a 13 A plug are limited to 3 kW; see 13 amp vs 32 amp hot tubs. Find a model by heater power and price: sauna finder, hot tub finder, ice bath and cold plunge finder.
How to read the table
At the price cap of 26.32p per kWh, one hour of a typical sauna, hot tub or cold plunge at full power costs between a few pence and a few pounds, depending on the heater.
In the UK one price cap applies in England, Scotland and Wales, so unlike in the US the cost does not depend on where you live. It depends on the heater: the table shows the lower quarter, the median and the upper quarter of the heater power that our UK listings state (equal values appear once).
A heater does not run at full power all the time: how long it runs depends on the insulation, the cover, the weather and how warm you keep it. To work it out for one model with your own numbers, use the running cost calculator.