- Home
- Calculators
Free power system calculators
Quick, standards-based checks for single elements: short-circuit current, cable size, voltage drop, power factor correction and per-unit values. Free to use, no signup. For the whole network, run a study in Electrisim.
- 5 free calculators
- Results update as you type
- No signup
-
Free calculator
Short-circuit current calculator
Fault current, peak current and fault level at a transformer’s secondary terminals, with IEC 60909 factors.
-
Free calculator
Cable sizing calculator
Smallest copper or aluminium cable for your voltage drop limit and short-circuit current, plus the derated current-carrying capacity it needs.
-
Free calculator
Voltage drop calculator
Cable voltage drop and power loss for three-phase, single-phase and DC circuits, with IEC 60228 conductor data.
-
Free calculator
Power factor correction calculator
Capacitor bank size in kvar for a target power factor, with current, capacitance per phase and line-loss reduction.
-
Free calculator
Per-unit calculator
Base impedance and current, ohms to per-unit and change of base for transformers, lines and generators.