Sauna Heater Calculator

Ever wondered if what size sauna heater you need? Well you've come to the right place.

This sauna heater power calculator helps you determine the ideal heater size for your sauna. Simply enter your sauna’s internal dimensions and the measurements of any uninsulated areas, such as glass walls or doors.

The calculator also takes into account whether the sauna is outdoors, ensuring an accurate recommendation tailored to your setup. This tool makes it easy to choose the right heater to ensure optimal performance and comfort.

Calculate Recommended Heater Power

Enter Sauna Depth (m): Enter Sauna Width (m): Enter Sauna Height (m): Enter Uninsulated Wall Length (m): Enter Uninsulated Wall Height (m): Is this an outdoor sauna?

If you already know the size of your sauna and heater you can use our handy calculator below to estimate the time it will take to reach 80°C.

Estimate Heat-Up Time to 80°C

Enter Sauna Volume (m³): Enter Uninsulated Surface Area (m²): Enter Heater Power (kW): Enter Ambient Temperature (°C): Is this an outdoor sauna?