Free Wood Stove BTU Calculator — Instant Sizing | WoodStoveCalc

Size your wood stove perfectly for free. Get instant sizing for the required BTU output based on your home's square footage and insulation. Avoid undersized stoves and cold rooms.

How to Use the BTU Calculator

Enter the total square footage of the area you want to heat. Input the ceiling height and select your insulation quality.

The tool provides the target BTU per hour. A standard insulated home in a cold climate needs approx 30-40 BTU per square foot.

Always choose a stove with a slightly higher peak rating than your requirement to ensure it can keep up during extreme cold snaps.