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BTU Calculator

Find the perfect radiator to heat your room with the Towelrads BTU calculator. Find the optimum number of BTUs required for your room and create that warm, cosy temperature.

BTU stands for British Thermal Units and is a unit of measurement for energy. Example: 150 BTU is equal to the amount of energy used to raise the temperature of 150 pounds of water 1-degree Fahrenheit. You will see BTU used when referring to the amount of heat a radiator emits to raise the temperature in a room. The higher the BTU number associated with a radiator, the more heat that radiator can produce to warm the room.

BTU Calculator
  • Room type:
  • Living Room
  • Dining Room
  • Hallway
  • Kitchen
  • Bedroom
  • Bathroom
  • Is the house:
  • Sheltered
  • Average
  • Exposed
  • Window type:
  • Single Glazed
  • Double Glazed
  • Dimensions
  • to
  • to

Disclaimer: Please note – Our calculations are only estimated and are based on information you provide. Our heating calculator can only process the most common factors that affect heat loss and may not take into account all factors relating to your particular requirements. Any results provided by our heating calculator should not be considered 100% accurate, and we accept no liability for any errors resulting from the estimates given. Calculations based on Delta – T 50°C (Δ-T50°C).

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