Soapstone

Pipe fitter math, marked right the first time.

Coming soon to Google Play · Android

A feet-inch-fraction calculator for pipefitters, welders and plumbers. Offsets, rolling offsets, cut lengths, branch templates and mitered elbows, each drawn to scale, with the math written out under every answer so you can check it by hand.

Pay onceOne purchase unlocks every calculator. No subscription, ever.

Your fittings, your numbersSave the take-outs and radii of the fittings you actually use, once. Every calculator reuses them.

Works in the holeNo signal needed. No ads, no account, no tracking.

23 tools

Free, no limits	Feet-inch-fraction calculator, offset, cut length, cut-back elbow, wrap & layout marks, grade & fall, pipe volume & water weight, right triangle, unit converter
3 free uses, then Pro	Rolling offset, branch template, mitered elbow, cut optimizer
Pro	Rolling offset from travel, odd-angle offset, parallel offsets, parallel rolling offsets, around an obstruction, fitting stack-up, bolt circle, elevations, tank volume, thermal expansion

Pro also adds History and jobs with cut lists you can share as PDF. Your purchase goes through Google Play and restores on a new phone with the same Google account.

Welded, threaded or glued

Take-out, make-up and root gap are separate inputs, so the same cut-length math works for butt weld, threaded, socket weld, grooved, copper and plastic. Each fitting you save remembers its joint.

Private by design

No sign-up, no ads, no tracking. The app doesn't use the internet; the only connection is to the Google Play app on your phone for buying and restoring Pro. Privacy policy