AngleWise is a free set of construction angle calculators for stairs, roof rafters, crown molding, and any triangle on the job. Type the numbers you actually have — we hand you the cut angle and the plain-English saw setting. Free in your browser now, with a job-site app coming that works fully offline.
Six free angle calculators, each on its own page with a plain-English guide. No sign-up, no trig — just the numbers you have and the cut you need.
Rise & run to stringer cut angle, number of steps, and stringer length. Build code-friendly stairs.
Open calculator → 02Pitch and span to rafter length, plumb cut, and bird's-mouth seat cut. Pitch shown in degrees too.
Open calculator → 03Spring angle and corner to exact miter & bevel for cutting crown flat on the saw.
Open calculator → 04Enter any two parts of a right triangle — sides or an angle — and get the rest, including the cut angle.
Open calculator → 05Span and slope to peak height, sloped length, and the peak & wall angles for trim and drywall.
Open calculator → 06Common and hip rafter lengths, plumb cuts, and jack rafter cheek cuts from your pitch and run.
Open calculator →AngleWise is a free construction angle calculator built for people who work with their hands. Instead of forcing you to remember trigonometry, it asks for the measurements you already have on the job — rise and run, pitch and span, spring angle and corner — and hands back the exact angle to set your saw, in plain carpenter's language. It covers the angles tradespeople hit every day: stair stringers, roof rafters, crown molding, vaulted ceilings, hip and valley rafters, and any right triangle.
Every calculator works right in your phone or desktop browser, free, with nothing to install and no account to create. Flip between imperial and metric with one tap. Whether you're a framer, a finish carpenter, a remodeler, or a weekend DIYer, the goal is the same: give you a number you can trust and cut to, the first time.
The website is free and stays free. The upcoming AngleWise mobile app is for the reality of the job site: it works fully offline when there's no signal, lets you save and name your projects, builds cut lists for the lumberyard, and carries no ads. Same trusted calculators, built to live in your truck and your tool belt. Leave your email below and you'll be first to know the day it launches on iOS and Android.
Every calculator here is free, forever, in your browser. The app is for when the job site has no signal.
Leave your email and we'll tell you the moment the AngleWise phone app launches — offline calculators, saved projects, and cut lists for the job site. No spam, just the launch.
