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Home / Mechanical

Mechanical Calculators

Free mechanical engineering calculators for torque, gears, timing belts, roller chains, bearings, fluids, hydraulic and pneumatic cylinders, air compressors, bolts, machining feeds, tap drill sizes, and Moody diagram friction factors. 33 calculators across 4 categories.

Fluids

Pipe Volume CalculatorOpen →Fluid Velocity CalculatorOpen →Reynolds Number CalculatorOpen →Flow Rate CalculatorOpen →Tank Volume CalculatorOpen →Pressure Loss CalculatorOpen →Pump Power CalculatorOpen →Hydrostatic Pressure CalculatorOpen →Hydraulic Cylinder Speed CalculatorOpen →Pneumatic Cylinder CalculatorOpen →Air Compressor Size CalculatorOpen →Moody Diagram CalculatorOpen →

Rotation

Torque CalculatorOpen →Horsepower CalculatorOpen →Gear Ratio CalculatorOpen →Angular Velocity CalculatorOpen →

Machinery

Belt Length CalculatorOpen →Surface Speed CalculatorOpen →Bolt Torque CalculatorOpen →Efficiency CalculatorOpen →Shaft Diameter CalculatorOpen →Hydraulic Force CalculatorOpen →Mechanical Advantage CalculatorOpen →Tap Drill Size CalculatorOpen →Feed Rate CalculatorOpen →Timing Belt CalculatorOpen →Bearing Life CalculatorOpen →Roller Chain CalculatorOpen →Bolt Circle CalculatorOpen →

Force & Motion

Beam Deflection CalculatorOpen →Spring Rate CalculatorOpen →Moment of Inertia CalculatorOpen →Stress and Strain CalculatorOpen →
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Free Online CalculatorsFree Online Calculators

Free online calculators and calculation tools for engineering, trades, and everyday math. Fast, accurate, and always free.

© 2026 Free Online Calculators. All rights reserved.