BTU Calculator

To work out how much heat you will need to keep your room nice and cosy, just enter the dimensions and answer 3 simple questions and our advanced algorithm will calculate the BTUs required.

BTU & Watts Calculator

BTU (T50)

Watts

Please note: This is just a guide for reference only. Larger rooms may require more than one radiator, if this applies to you, simply divide the output between the number of radiators needed.

Find Your Perfect Radiator or Heated Towel Rail

Confused about BTUs and Watts? Our easy-to-use calculator helps you determine the ideal radiator size for your room. Learn the importance of BTUs, Delta T, and how they impact your heating efficiency.

BTUs (British Thermal Units) and Watts are units of measurement used to quantify the amount of heat energy required to warm a specific space. When selecting the right radiator, understanding these units is crucial.

Delta T refers to the temperature difference between the radiator's water inlet and outlet. This factor significantly influences the radiator's heat output. A higher Delta T generally means more efficient heat transfer.

Why BTUs and Watts Matter

Correct Sizing: A radiator that's too small won't adequately heat your room, while one that's too large can be inefficient and costly to run.
Energy Efficiency: The right-sized radiator optimizes energy consumption, reducing your heating bills.
Comfort: A properly sized radiator ensures consistent and comfortable warmth throughout your home.

Use our BTU and Watt Calculator to accurately determine the ideal radiator size for your specific needs.

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