A pocket reference and calculator suite for machinists — built by our team to speed up everyday shop-floor math. Convert units and run turning, milling, drilling, and threading calculations in both imperial and metric.
Every module runs in imperial or metric, right from your phone or browser.
Quick conversions for length, speed, volume flow, power, pressure, angle, temperature, weight, volume, torque, force, and taper angle — plus degree/D-M-S conversion and a full drill size reference.
RPM, cutting speed, feed rate, material removal rate, power, surface roughness, and cycle time for lathe work.
RPM, feed rate, material removal rate, cutting power, chip thinning, scallop height, engagement angle, and bolt circle hole positions for mill work.
Tap drill sizing across Inch Unified, Metric M Profile, British Whitworth (BSW), British Fine (BSF), British Association (BA), and Model Engineer (ME) thread standards — including thread-forming taps — by target thread engagement %.
UN, M-profile, and Buttress thread data with class fits and three-wire measurement for precision thread cutting.
Right-triangle solver — finds all sides and angles from any two known values, with a live diagram.
Sine bar stack height & angle solving, true position with MMC/LMC/RFS bonus tolerance, and ANSI shaft & housing fit-class limits.
Download the Android app for full offline access on the shop floor, or use the web version directly in your browser — no install required.
Results are theoretical and intended as an aid only — always verify calculations meet your job's requirements before relying on them.
