Sauna Size & Electrical Calculator
Find the right sauna size for your group, the heater kW for your room, and whether you need 120V or 240V.
Step 1: How many people?
Step 2: Room size (interior, feet)
Step 3: 120V or 240V?
Estimates use common industry rules of thumb (about 1 kW of heater per 45–50 cubic feet of insulated room, more for glass, masonry and outdoor builds). Always follow your heater manufacturer's sizing chart and have a licensed electrician confirm wiring, breaker size and permits. Questions? Call or text (737) 377-2909.