Electrical Calculators
Size electrical components and calculate loads
Wire Size Calculator
Calculate required wire size based on amps, voltage, and distance
Voltage Drop Calculator
Calculate voltage drop percentage and end voltage for long runs
Conduit Fill Calculator
Check NEC conduit fill compliance for various wire types and sizes
Ampacity Calculator
Determine wire ampacity after derating for temperature and bundling
Lighting Calculator
Calculate lumens and light fixtures needed for any room type
Watts to Amps Calculator
Convert Watts to Amps and Volts for single and three-phase circuits
Electricity Cost Calculator
Calculate energy usage and cost for any appliance
Conduit Bending Calculator
Calculate multipliers and shrink for offset bends
Transformer Sizing Calculator
Calculate kVA rating for single and three-phase transformers
Battery Backup Calculator
Estimate battery capacity needed for UPS or solar storage
Electrical Power Calculator
Convert between Watts, Volts, Amps, VA, and HP
Motor FLA Calculator
Calculate Full Load Amps for single and 3-phase motors
Breaker Sizing Calculator
Determine circuit breaker size for continuous/non-continuous loads
Box Fill Calculator
Calculate electrical box fill to prevent overcrowding
Grounding Wire Calculator
Size Grounding Electrode Conductors (GEC) per NEC 250.66
Fault Current Calculator
Estimate available short circuit current at transformer secondary
Cable Tray Fill Calculator
Calculate cable tray fill ratio and sizing
Capacitor Sizing Calculator
Calculate kVAR needed for Power Factor Correction
LED Savings Calculator
Compare energy cost savings of LED bulbs vs incandescent
Generator Sizing Calculator
Estimate generator wattage needed for home or job site