Workbench tools
Electrical engineering tools
Calculators for turns ratios, motor torque and speed, and conductor sizing. Each tool lists its inputs, outputs, and the assumptions behind it.
Calculators
Core utilities
Transformer turns ratio
Enter primary voltage, secondary voltage, and either turns count to find the matching ratio, primary turns, and current limits.
Motor speed and torque
Convert between speed and torque at a given power rating to check mechanical output against the electrical input.
Conductor resistance
Look up resistance per length by conductor gauge, then estimate voltage drop over a circuit run for wire selection.
Before you calculate
Assumptions and units
All tools use SI units: volts, amperes, ohms, watts, newton-metres, and revolutions per minute. Results assume steady-state operation, ideal coupling in transformer calculations, and conductor values at a stated reference temperature.
Measurement tolerances are noted beside each output. Treat results as estimates for study and preliminary design, and verify final values against the relevant standard and manufacturer data before building or purchasing equipment.