Radiator Calculator

Our electric radiator calculator takes the guesswork out of choosing a radiator size - making it quick and easy to finalise your purchase and keep your home warm. Simply tell us your room dimensions and some basic information about your property and the calculator will do the rest - providing the total wattage you need to heat your space. Whether you buy one radiator that equals that total, or a combination of different radiators, is entirely up to you! If the wattage provided is in between sizes, it’s better to round up rather than down as this allows your radiators to use less energy to maintain temperatures.
All information and advice in relation to product suitability is for general guidance only… Read MoreRead Less

The Radiator Calculator assumes a maximum ceiling height of 2.7 metres and is designed to calculate the heating requirements of standard domestic living spaces. We recommended speaking to our heating advisors. if you are looking to heat a room with high ceilings, large areas of glass, exceptionally high heat loss or an unusual shape or style. This includes conservatories, orangeries, garden rooms, garage conversions, hallways, stairways, landings, multi-storey rooms and workshops. You can call us or contact us online for a free, tailored quotation and expert advice.
Please Note:
All information and advice in relation to product suitability is for general guidance only. We cannot guarantee that any product is suitable for your requirements or that your electrical system has the capacity to power the products that you purchase from us. This is your responsibility and Electric Radiators Direct recommends that you seek the professional opinion of a qualified electrician before placing your order. Electric Radiators Direct shall have no obligation to accept the return of any product on expiry of the 30 Day No Quibble Money Back Guarantee