Engineering Calculators
Electrical, mechanical and construction calculators. Instant result with formula, examples and step-by-step calculation. Free online calculator.
Engineering design and analysis demand precise calculations across mechanical, civil, chemical, and systems engineering disciplines. These tools help engineers compute stress and strain values, model fluid dynamics parameters, analyze thermodynamic cycles, and verify design specifications against industry standards and safety factors.
All Engineering Calculators
Ohm's Law Calculator
Voltage, current, resistance and power (V = IR). See formula, variable legend, worked example and unit conversions. Instant electronics solver.
Horsepower Calculator
Calculate engine horsepower from torque and RPM. Enter torque (lb-ft or Nm) and RPM — see HP and kW with conversion. Free.
Bandwidth Calculator
File transfer time at any connection speed. Instant conversion with formula, worked example and all representations shown.
Stair Calculator
Step count, riser height and tread depth. Instant material estimate with formula, waste factor and step-by-step calculation guide.
Tile Calculator
Tiles needed for any room size with waste factor. Instant material estimate with formula, waste factor and step-by-step calculation guide.
Roofing Calculator
Roofing squares and shingle bundles by pitch. Instant material estimate with formula, waste factor and step-by-step calculation guide.