Underfloor Heating Calculator
Estimate system power, cable length or mat area, and monthly energy usage. The calculator accounts for floor finish, heating mode, and heated coverage.
Renohacks Pro Tool
Underfloor Heating Calculator
Estimate heating power, cable length or mat area, and monthly energy consumption.
Usually 70–90% (leave zones under furniture unheated)
Typical mats: 130–160 W per m²
Thermostat usually keeps 50–70% average load
e.g. 0.15 $/kWh or 0.12 €/kWh — cost is indicative.
What the calculator includes
- Floor finish. Tile, laminate, vinyl, and wood have different recommended power levels.
- Heating mode. Comfort or primary heating affects power recommendations.
- System type. Cable length or mat area are calculated based on your selection.
- Energy usage. Hours, days and average thermostat load are included.
Power selection
Typical recommendations: 150–180 W/m² for tile, 120–160 W/m² for laminate/vinyl, and 100–140 W/m² for wood. Primary heating uses higher values.
Energy estimate
A thermostat reduces load. Typical average load is 50–70% with 5–8 hours per day. Adjust values to match your usage.
Simple instructions
- Enter room area and heated coverage (usually 70–90%).
- Select floor finish, heating mode, and floor below.
- Pick system type and cable/mat power.
- Set hours, days and average load to get power, length, and energy use.