This project calculator it so handy when working on any build project where you are mixing feet and inches.

With my 1/10 scale drawings I'm just working in inches or decimal inches. With my 1/16 scale drawings I am working in feet, inches and fractions of inches and this little calculator does a very good job of converting between the two.

Their worth having in your bag of tricks for any Construction or remodel job particularly if you are doing drawings.