Rise & Run

Rise & Run works out the cuts for a set of stairs. Enter your total rise and it gives you the riser height, the tread depth, and every measurement you need to lay out a stringer.

Built for the person standing at the sawhorses with a framing square.

What it does

• Riser and tread worked out from your total rise, to the sixteenth of an inch or the millimetre
• A scale diagram of the stringer that redraws as you type
• Code checks against the IRC — riser height, tread depth, headroom, and how much solid stringer is left behind the notches
• A full cut list with a zoomable, annotated diagram
• A shopping list: lumber lengths, stringer count, and fasteners
• A step-by-step cutting wizard, from setting the stair gauges to templating the rest
• Inches or millimetres, switchable at any time

Works where you work

Every calculation runs on your phone. No account, no signal, no setup — the app behaves the same in a basement as it does on a site with no bars.

Check your local code

Rise & Run checks against common IRC residential limits. Local codes vary, and your inspector is the authority. Confirm before you cut.