Calculate voltage, current, resistance, and power. Includes the full Ohm’s Law wheel with all four forms.

Calculate output voltage from two resistors, find R values for a target voltage, and account for load impedance.

NEC-compliant wire sizing with temperature derating, bundling factors, and voltage drop calculation for any run length.

Convert between HP, torque, and RPM. Includes shaft torque calculation and hydraulic power conversion.

Calculate output speed, torque, and efficiency for single and compound gear trains. Includes gearbox efficiency table.

Normal stress, shear stress, axial strain, and factor of safety. Material presets for steel, aluminum, titanium, and more.

Tightening torque, clamping force, and bolt stress. Metric and UNC/UNF bolt presets, multiple nut factor options.

Determine laminar vs turbulent flow regime. Supports circular pipes, rectangular ducts, and external flow geometries.

Darcy-Weisbach pressure drop with Colebrook-White friction factor. Roughness table for all common pipe materials.

Hydraulic power, shaft power, motor input power, and next standard motor size. Multiple fluid presets, SI and Imperial.

Linear and volumetric expansion for 10 common materials. Calculates final dimension and thermal strain.

Conduction, convection, and radiation heat transfer rates. Material conductivity presets and convection coefficient reference.

Simply supported and cantilever beams under point and uniform loads. Checks L/360, L/240, and custom deflection limits.

Convert between SI and Imperial for length, mass, temperature, pressure, power, flow rate, torque, and energy.