Stove Calculator

What is the Stove Calculator?

The Stove Calculator calculates the suitable stove power based on the sauna’s volume and uninsulated surfaces. The stove power must be chosen according to the room size: a stove that is too small will not heat, while one that is too large will consume electricity and the steam will be harsh.

The calculator is free, works in your browser without registration, and shows the result as soon as you change the values. The calculation is done on your device, and the information you enter is not sent anywhere.

Formula and Calculation Principle

Calculated volume = sauna volume + 1.2 m³ for each uninsulated square meter. The stove power is approximately 1 kW for each calculated cubic meter.

Practical Example

The sauna measures 2.5 × 2.0 × 2.2 meters, which is 11 m³, and has 3 m² of log wall. The calculated volume is 14.6 m³, so the suitable stove is about 15–16.5 kW. With default values, the calculator gives the result: Suitable stove power 15.0 kW.

Who is the calculator suitable for?

For planners of sauna and stove renovations or new constructions who want to choose the right-sized stove.

Tips and Notes

• Measure the sauna’s interior dimensions, not the exterior dimensions.
• Add power if the walls are made of logs or stone.
• Check the manufacturer’s volume recommendation before purchasing.