Stair Calculator
Free stair calculator. Estimate riser count, riser height, tread depth, total run, and approximate stringer length from your project dimensions.
Open Stair CalculatorTopic hub
Stair Calculator Hub
Compare stair rise, run, risers, treads, angles, deck stairs, and stringer geometry for early layout planning.
Calculators
Start with the estimate that matches your job.
Each page solves a distinct planning task so you can move from dimensions to a more useful purchase or layout check.
Deck Stair Calculator
Free deck stair calculator. Estimate deck stair risers, treads, rise, run, angle, and approximate stringer length for early layout planning.
Open Deck Stair CalculatorRise and Run Calculator
Free rise and run calculator. Convert total rise, riser count, and target tread depth into total run, angle, and stringer length estimates.
Open Rise and Run CalculatorStair Angle Calculator
Free stair angle calculator. Convert stair rise and run into degrees, slope percentage, pitch ratio, and approximate stringer length.
Open Stair Angle CalculatorMethod
Measure, estimate, verify.
Use calculators to prepare a first material plan, then verify actual material, plans, manufacturer requirements, and local rules before committing to a build.