Engineering Torque Calculator

Engineering Torque Calculator is your all-in-one mechanical torque calculator for bolts, motors, shafts, and everyday lever problems. Get fast, clear results whether you are sizing a drive, checking a fastener, or converting Nm to lb-ft. FIVE CALCULATORS FOR REAL ENGINEERING WORK • Lever torque — Force, lever arm, and angle to applied torque (Nm, lb-ft, and more). • Unit converter — Switch between Nm, lb-ft, lb-in, kgf-m, kgf-cm instantly. • Bolt tightening torque — Metric and inch sizes, strength classes (8.8, 10.9, …), friction for oiled or dry threads; tightening torque and preload estimates. • Motor power & torque — kW or HP plus RPM to shaft torque; efficiency and service factor presets for smooth, fluctuating, and impact loads. • Shaft diameter — Design mode finds a recommended standard diameter; analysis mode checks strength and rigidity with bending moment, materials, hollow shaft option, and utilization. WHY ENGINEERS CHOOSE THIS APP • Simple home screen — open the right tool in one tap • Built-in guides on every screen • Live results as you type • Service factor help text for fans, conveyors, crushers, and heavy shock • Suggested standard shaft sizes where applicable MULTILINGUAL English, Turkish, German, Arabic, Spanish, and Hindi — change language in Settings. WHO IT IS FOR Mechanical engineers, maintenance teams, machine designers, technicians, and students working with motors, gearboxes, fasteners, conveyors, pumps, and rotating equipment. IMPORTANT NOTICE Results are engineering estimates for planning, education, and field checks. Always verify critical applications with your company standards, applicable codes, and qualified professional review before manufacturing or installation.