Engineering / Mechanical math.
Mechanical
Beams, motors, hydraulics, gears, and torque for designers, technicians, and field engineers.
10 tools available
Beam Span & Size Estimator
Quick-check a wood, LVL, or W-shape against deflection.
Open tool
Spread Footing & Pad Sizer
Estimate a square isolated pad for axial and moment loads.
Open tool
Rebar Weight & Length Calculator
Convert bar size, length, and lap into pounds and tons.
Open tool
Stair Stringer Calculator
Lay out rise, run, and stringer length to code.
Open tool
Motor Horsepower Converter
Convert between mechanical, metric, BTU, and electrical HP.
Open tool
Gear Ratio & Output RPM
Compute gear train ratios, output RPM, and torque multiplication.
Open tool
ASME Shaft Diameter Sizer
Estimate a shaft diameter from torque and material allowable.
Open tool
Screw Jack Mechanical Advantage
MA, velocity ratio, and efficiency for a screw jack.
Open tool
Two-Pulley RPM & Speed Ratio
Match driver to driven pulley by RPM, diameter, and belt length.
Open tool
Spring Rate (k) Calculator
Size a compression or tension spring from load and deflection.
Open tool