BTU Calculator

Heat Output (BTU) Calculator

Use this calculator to determine the required heat output to heat your room.

A BTU (British Thermal Unit) is a unit of measurement of heat per hour. The BTU calculator will determine the size and quantitry of radiators needed per room.

Room Type

Dining Room

Lounge

Bathroom

Bedroom

Kitchen

Room Dimension

Metres

Feet

Width

Length

Height

Extras

Is your room North facing?

Does your room have French windows?

Does your room have double glazing?