Feldon's BBQ Pit/Smoker Build Calculator for All Firebox Shapes v3.7
New Permalink feature! Save your Smoker calculations or Share them with a friend!
There are any number of ways to design and build a BBQ Smoker. Hopefully this calculator will help you with the calculations. The general rule of thumb for a horizontal smoker is that the firebox should be 1/3 the size (volume) of the cooking chamber. These are just guidelines based on years building smokers but your mileage may vary!
This calculator is based upon the BBQ pit building ratios and formulas developed by Alien BBQ
in his revelatory BBQ pit building guides. One of his best articles is Lessons Learned in Pit Building / Modifying
. My starting point for this calculator was the Excel worksheet
created by Tom C
(an excellent BBQ discussion forum and website).