1/5

Dewalt Mobile Pro

The Basics: Developed by Portland, Oregon-based Infinity Softworks, this app includes a basic construction calculator for free, plus several trade-specific add-on packs that cost extra. Those options are: business, carpentry, concrete, construction math, site work, finish materials, trim carpentry, landscaping and electrical.

Highlights: In the freebie version, you can calculate feet and inches for lengths, areas and volumes. You can also estimate what you’ll need in terms of paint, studs, drywall sheets and bags of concrete.

Bummers: Rounds answers to the nearest 64th, which does not appear on standard tape measures. The wallpaper calculator does not consider repeats.

What the Pros Say: “As a Project & Safety Coordinator for a structural steel company I found this very useful. As a homeowner, I find it indispensable!”

2/5

Construction Calc Pro

The Basics: Developed by Lightray Studio, this app for Android and iOS has 82 construction calculators, including 15 measurement calcs and 32 material estimators.

Highlights: Allows you to work in feet, inches and fractions of inches.

Bummers: Inputted values are cleared when the screen shuts off. Unit conversions are rather tedious.

What the Pros Say: “I use this app a lot as an inspector to double check the contractor’s math. I have saved people some serious heartache with this over the last year. Totally worth it.