Heated Floor Calculator
Mat sizing and thermostat for electric radiant floor.
Inputs
sq ft
%
W/sqft
hrs
$/kWh
ft
Results
Heated area
96 sq ft
Thermostats needed
1
Monthly operating cost
$35.94
Total wattage1,152 W
Breaker size15 A
Recommended voltage120 V
Mat length48 lin ft
How to Use This Calculator
- Enter the total room floor area in square feet.
- Enter the percentage of floor area under cabinets and fixtures (not heated).
- Set the heating output in watts per square foot (12 W is standard; 15–20 W for cold climates).
- Enter average daily run time in hours and your local electricity rate in $/kWh.
- Review the daily and monthly operating cost, mat roll dimensions needed, and circuit load.
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