Electrical Calculators
Three focused tools for sizing branch and feeder conductors, calculating resistive line loss, and sizing utility or isolation transformers.
Wire Size & Ampacity
Enter current, voltage, length, and conductor type to find the recommended AWG size satisfying both thermal ampacity and voltage drop limits.
Voltage Drop
Analyze line losses for an existing or planned wire gauge over distance. Includes an interactive curve comparing nearby AWG options against the 3% target.
Transformer Sizing
Compute single-phase and three-phase apparent power (VA) and find the next standard NEMA commercial transformer rating with continuous duty margin.