Need to know which wattage electric heater you need?

Choosing the correct wattage heater can help reduce your energy bills. An electric heater/radiator that is too large may increase your bills unnecessarily, and an electric heater/radiator that is too small will not provide enough heat and will be constantly running at it's maximum.

By using our Electric Heating Calculator below, you can work out the wattage required for a particular room for electric radiators, panel heaters or fan heaters. This will ensure that your room(s) will be heated comfortably and efficiently.

Height of room (m)

Width of room (m)

Depth of room (m)

Window area (m²)

Type of room

What is below the room?

What is above the room?

Type of outside walls

Type of windows

Number of outside walls

Watts required

BTUs required

Some electrical heating manufacturers will prefer to list their products in terms of BTU, so we have converted watts into BTUs here

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