Calcubench: Engineering Calc

Calcubench is a fast, offline unit converter and engineering calculator toolkit built for engineers, technicians, and students who need reliable unit conversions and mechanical calculations without hunting through reference books or spreadsheets. No ads, no account, no internet required.

UNIT CONVERTER
Convert length, mass, force, pressure, energy, power, torque, area, volume, speed, angle, density, viscosity, and flow rate — instant unit conversion, fully offline, metric and imperial, with pinnable categories.

FRACTION ↔ DECIMAL
Convert fractional inch measurements to decimal and back, with adjustable precision down to 1/64".

POWER ↔ TORQUE
Convert between power and torque at a given rotational speed, or solve for torque directly.

MATERIAL & FLUID DATABASE
Built-in mechanical properties for common engineering materials and fluids — density, elastic modulus, shear modulus, yield and tensile strength, viscosity — plus the ability to add your own custom materials.

BEAM DEFLECTION (free)
Maximum beam deflection, bending stress, and safety factor. Pick a basic profile (rectangular, circular, tube, I-beam) or a real rolled structural steel shape from the built-in AISC/DIN/JIS catalog — with its actual published moment of inertia, not an estimate. Optionally include the profile's own self-weight as an additional distributed load.

PRO TOOLS — one-time unlock, no subscription
Unlock a full set of mechanical engineering calculators:
• Torsion — angle of twist and shear stress for shafts
• Shear — maximum transverse shear force and safety factor, with the same structural steel catalog and self-weight option as Beam Deflection
• Buckling — Euler critical load, slenderness ratio, critical stress, and eccentric (secant formula) loading for columns
• Fatigue — stress-life (S-N) analysis, endurance limit with Marin factors, Goodman/Soderberg/Gerber criteria, and finite life in cycles
• Fastener Calculator — bolt torque, preload, and tensile stress area
• Pipe Flow Analysis — Reynolds number, pressure drop, and flow rate
• Weight Estimator
• Bolt & Torque Chart, Drill & Tap Size Chart
• Structural Shapes reference — dimensions, weight, and moment of inertia (Ix, Iy) for common AISC, DIN, and JIS steel shapes

WORKS FULLY OFFLINE
No internet connection needed — every calculation runs on your device. No ads, no tracking, no account required.

Whether you need a quick unit converter for a jobsite calculation or a full engineering calculator for beam deflection, bolt torque, torsion, and buckling analysis, Calcubench keeps it fast, accurate, and private. Available in English and Spanish, with metric and imperial units throughout, and adjustable decimal precision.