BTU Calculator
Use our BTU Calculator to quickly find the right heater size for your space. Simply enter room dimensions, insulation type, outdoor temperature, and your desired indoor temperature. This heating BTU calculator instantly shows you how to calculate BTU needs with accurate results. Whether you need a BTU heater calculator for a small room, workshop, or large building, this tool helps you choose the most efficient heater with confidence.
Step 1:
Calculate the number of cubic feet to heat
x
x
Number of Square Feet Equals
0
Step 2:
Calculate the temperature difference factor (C)
−
Difference factor uses a scale of 37.5 C or 67.5 F with a minimum of 0.20.
Difference (C) =
0
Difference Factor =
0.20
Step 3:
Calculate the Insulation Factor of the Space to Heat
Insulation Factor =
2.00
Calculate the Required Number of BTUs
Number of Square Feet
0 pi
x
Temperature difference factor
0.20
x
Insulation Factor
2.0
=
Required Number of BTUs
0