How to Convert From BTU to Fahrenheit

How to Convert From BTU to Fahrenheit
••• Smileus/iStock/GettyImages

BTU, or the British Thermal Unit, is the amount of heat required to raise one pound of water one degree Fahrenheit. The British Thermal Unit measures the amount of heat, or thermal energy. Temperature is the level rather than amount of heat. Therefore, there is no formula to convert a British Thermal Unit to Fahrenheit. Instead, the British Thermal Unit indicates the ability of a stove, heating system, grill, water heater and other appliances to increase temperature.

    Find the British Thermal Unit rating for the appliance or equipment. Consult the specifications page of the owner's or operator's manual or the appliance's manual.

    Determine the amount of space or water to be heated. Calculate the space in cubic feet by measuring the length, width and distance from floor to ceiling of the building or space to be heated and multiplying the three figures. For water, multiply the number of gallons to be heated or used by 8.3453, since one gallon of water equals 8.3453 pounds.

    Multiply the cubic feet of the area to be heated by 0.133. Divide the British Terminal Unit of the heating unit by the factor of cubic feet and 0.133 to obtain the change in temperature. For heating water, divide the British Thermal Unit by the pounds of water to be heated.

    Things You'll Need

    • Appliance operator's or owner's manual
    • Appliance label
    • Calculator


    • To determine the temperature of water after it is heated, add the water temperature change to the temperature of the water before it is heated.


    • Consult your local or state health department for the required temperatures of water and food for restaurants, child care centers and other public establishments and facilities. The standards for temperatures will determine the British Thermal Unit rating required for the heating element.

Related Articles

How to Calculate Heat Flux
How to Calculate Evaporator Sizing
How to Calculate Tons of Cooling for a Cooling Tower
How to Calculate Condensate Flow From AC Units
How to Calculate Heat of Sublimation
How to Find Relative Humidity
How to Convert Gallons, Quarts, Pints and Cups
How to Calculate Heat Flux
How to Calculate Molar Heat Capacity
How to Convert Joules to Kelvin
How to Calculate the Amount of Heat Transferred
How to Calculate the Volume of Water in a Square Tank
How to Calculate the Mass of a Solid
How to Convert Celsius to Fahrenheit for 5th Grade
How to Convert Ccf to Mmbtu
How to Calculate Temperature From BTU
How to Calculate Joules of Heat
How to Calculate Saturation Pressure
How to Calculate the Square Meters in a Triangle
How to Concentrate a Solution