Shop calculators. Free, no signup.
The math you do at the machine and the inspection bench, worked out and shown. True position with bonus, bolt circles, thread wires and sine bars. Works on your phone.
True position
Position diameter from X/Y deviations, with MMC and LMC bonus and the work shown.
OpenBolt circle
X and Y for every hole on a bolt circle, the chord between holes, and a preview.
Open3-wire threads
Measurement over wires for UN and metric threads, and the best wire size to use.
OpenSine bar
Gauge block stack for any angle, or the angle from a stack. Takes D°M'S".
OpenGD&T cheat sheet
Every GD&T symbol and modifier on one printable page for the wall by the machine.
OpenFree AI ballooner
Upload a drawing and get every dimension numbered, plus a Form 3 spreadsheet.
OpenGot the drawing too? Balloon it free.
Upload a PDF drawing. Deburr numbers every dimension, GD&T frame and note, and gives you the ballooned PDF and a Form 3 spreadsheet. No account needed.