Stair Calculator

▶ Cutting a stair stringer is one of the trickiest DIY jobs. Stair Calculator does the math for you: enter your total rise and available run, and get evenly divided risers and treads instantly. ▶ See a clear stringer cut layout with the exact marking dimensions and framing-square settings, so you can transfer the cuts to your board with confidence. ▶ Built-in code check flags whether your riser height and tread depth fall inside common limits (IRC-style, with US, CA, EU and AU presets). It's a...