Finished dimensions
Measure the actual steam enclosure—not the rough framing or the entire bathroom.
Steam room sizing · about one minute
Find the right generator before you buy.
Enter your finished room dimensions and surface materials. We’ll calculate the adjusted room volume and give you a practical starting point for generator size.
Have measurements ready?The calculator takes about one minute.
Your recommendation
Start with measurements, not a product list.
We’ll adjust the room volume for surface material and exterior walls, then match it to the closest SteamSpa output.
- Measure finished interior dimensions
- Select the dominant surface
- Count walls exposed to the outdoors
Complex ceiling, bench, or glass layout? Call 1-866-431-0913
Why sizing matters
A comfortable room starts with the correct output.
Undersizing can produce slow warm-up and inconsistent steam. Oversizing adds cost and may make the experience harder to control.
Heat-retaining surfaces
Dense stone and extensive glass require more output than standard ceramic tile.
Exterior exposure
Walls facing outdoors lose more heat and increase the adjusted room volume.
Second opinion included
A calculator is a starting point. Our expertise finishes the job.
Share your room plan, construction materials, and project details with a specialist before ordering.
The SteamSpa experience