Johnson’s construction master calculator provides quick and accurate solutions for layout work and estimates, including pre-programmed right angle and stair calculations. 

Complete stair layouts, as well as roof, rafter and framing with powerful built-in solutions and advanced features to complete your work faster and more efficiently.  Use it in the field or office to save time and reduce costs. 

Its oversized LCD is easy to read and converts measurements in both English and Metric and the paperless tape mode is useful for checking figures while scrolling through the past twenty entries. Comes with durable protective case, user manual and handy reference guide.

• Pre-programmed right angle and stair calculations including pitch, rise and run
• Complete rafter, circular, rake wall and board feet calculations
• Easily calculate linear, area and volume
• Oversized easy to read LCD display
• Easily convert between building dimensions in both English and Metric
• Units of measure in yards, feet, inches, meters, cm and mm
• Rugged case provides protection from construction environments
• Durable ABS construction in hi-visibility orange
• Includes handy reference guide for common construction calculations
• Includes > 1 3V CR2032 lithium battery, protective case
• Power Supply:  1 3V CR2032 lithium battery (included)

Application
Our construction master calculator is an essential tool for contractors, carpenters, builders, estimators, and engineers by providing instant solutions for completing layouts, plans, bids, and estimates.  

Perfect for stair layout including pitch, rise and run, as well as simplifying solutions for slope, arcs, and circles.  

Complete complex rafters, square-ups, circular, rake wall and board feet calculations with ease.