Construction Math, Built for the Job Site
The precision calculator trusted by contractors and DIYers. Solve dimensional math, estimate materials, and tackle every construction calculation — stairs, roofs, triangles, and more — all in one powerful app.
Dimensional Calculator
Work natively in feet, inches, and fractions. Add, subtract, multiply, and divide measurements the way builders think — no unit conversions needed.
Construction Panels
Dedicated solvers for stairs, roof pitch, right triangles, arcs, on-center layout, concrete, drywall, studs, board feet, and more. Every trade covered.
AI Assistant
Ask AI follow-up questions about any calculation. Get explanations, alternative approaches, and guidance on your construction math — right in the app.
Calculation History
Every calculation is saved to your history tape. Revisit, reuse, and bookmark important results so no measurement is ever lost on the job site.
Material Estimator
Calculate concrete bags, drywall sheets, stud counts, board feet, and material costs — including waste factor — for accurate project estimates every time.
Dark & Light Mode
Easy to read in any light — from a bright job site to a dim crawl space. Switch themes to match your conditions and keep your eyes comfortable all day.