Online Calculators
Our easy-to-use calculators help you switch between units and figure out how many BTUs you need to heat or cool a space.
These tools also help you get the most out of your plumbing and heating systems, so you stay comfortable and save energy.
Conversion Calculator
Enter the number of units your want to convert to or from and choose the type of conversion.
British Thermal Unit (BTU) Calculator
Choose your room, glazing type and the unit of measurements then enter the width, length and height of your room to find out the total BTU requirement.