Your sauna toolkit
What no other planner does
Thermal X-ray
Watch your room heat up minute by minute, from the floor to the ceiling.
Ranked by fit, not commission
Heaters matched by each maker's own room range, never by commission.
In your garden, life-size
Open your design in AR on your phone and walk around it.
Your country's numbers
Your voltage, fuse, electricity price and climate, in your language.
Quick guides
Outdoor sauna
Type, size, foundation, heater, power and winter running costs.
Barrel sauna
Sizes, seats, heater kW and heat-up time compared.
Build a sauna
The build order, materials and the jobs for professionals.
Wood-fired hot tub
Heat-up time and firewood by size and weather.
Sauna stones
Kilograms per heater, stone types, stacking and replacing.
Sauna temperature
Typical settings, humidity and the heat at each height.
Barrel vs cabin
Small air volume and charm, or insulation and space.
Sauna cost
Kit, heater and build prices from real listings, plus the costs people forget.
About this planner
Saunoka is a free planner for home saunas, cold plunges and hot tubs. Start in the 3D studio: pick an indoor room, a garden cabin or a barrel, set the size, benches, door, window and heater, and the numbers follow every change.
- Heater fit: the effective volume of your room (glass, tile and solid wood count extra) against each maker's own room range, checked in the heater size calculator.
- Heat-up time and cost: a heat model of the air, walls and stones with your climate and electricity price (running cost, heat-up time).
- Wiring: the fuse or breaker the heater needs on your country's supply (electrical requirements).
- Cold and hot water: chiller size and running cost of a cold plunge, and what a hot tub costs per use.
Every number is an estimate with its assumptions on screen; makers' manuals and your electrician have the final word.
Questions and answers
What can I do with Saunoka?
Design an indoor sauna, garden cabin or barrel in 3D, add a cold plunge or hot tub, and see the heat-up time, cost per session, fuse size and the heaters whose makers rate them for your room. Every calculator also works on its own.
Is it free, and do I need an account?
It is free and needs no account. Designs live in the page link; saving one creates a private link you can share. Shops may pay us a commission when you buy through our links, which never changes the ranking.
Where do the numbers come from?
Heater ranges and specs come from makers' product pages and manuals (linked on every model). Heat-up times and costs come from a physics model of the air, walls and stones with your country's electricity price and climate, shown as estimates.