Exact calculator
Native fractional arithmetic with a reusable tape, memory, and answer recall.
Construction calculator
Construction math
you can trust.
Exact feet, inches, and fractions—plus practical trade tools that turn field questions into dependable answers.
iPhoneFractions, feet & inchesField-ready tools
Made for the field
Start with the calculation. Branch only when the job needs more.
BuildX respects the notation people use on site and keeps specialist tools close without turning the app into a cluttered catalogue.
Layout & framing
Stairs, rafters, right triangles, and area tools for real planning decisions.
Materials
Concrete, drywall, board feet, and baluster calculations with clear assumptions.
