Engineering calculators for people who keep plants running

114 free tools for maintenance, electrical and reliability engineers. Fast, accurate and built for the shop floor, with no sign-up.

114 tools8 categories11 free templates87 quick conversionsFormulas shown on every pageMetric and imperial

Formula on every pageSee exactly how each answer is worked out.

Metric and imperialbar and psi, Nm and ft-lb, mm and inches.

Built for phonesFast on the shop floor, no app to install.

Free, no sign-upNothing to register. Share results with a link.

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Motor current, cable voltage drop, power, 4–20 mA and PLC scaling, RTDs and circuit basics.

Torque, pulleys, gears, bearings, vibration analysis, springs, bolt torque, lifting and workshop tools.

Cylinders, accumulators, air leaks, pumps, pressure drop, tanks and line sizing.

MTBF, MTTR, availability, downtime cost, PM compliance, backlog and spares.

OEE, takt time, cycle time, capacity, scrap and changeover savings.

Pressure, torque, power, flow, force, temperature, speed and more.

Noise and vibration exposure and working at height.

Free Word and PDF templates: lockout tags, LOTO procedures, risk assessments, method statements, permits and maintenance records.

Lockout tags, LOTO procedures, risk assessments, method statements, permits to work, PM checklists and more. No sign-up.