Wire & Cable Tools
// PROFESSIONAL-GRADE ELECTRICAL CALCULATION TOOLS FOR WIRE SIZING, VOLTAGE DROP, AMPACITY, AND MORE //
Wire Gauge Calculator
Calculate the correct wire gauge (AWG) based on current, voltage, and wire length.
AWG Chart & Reference
Complete American Wire Gauge reference chart with wire diameter, resistance, and ampacity.
Voltage Drop Calculator
Calculate voltage drop in electrical circuits for proper wire sizing.
Wire Ampacity Calculator
Determine maximum current carrying capacity for different wire gauges.
Conduit Fill Calculator
Calculate conduit fill percentage and select proper conduit size.
Box Fill Calculator
Calculate NEC 314.16 outlet, switch, and junction box fill volume.
Pull Box Size Calculator
Calculate NEC 314.28 straight pull, angle pull, and U-pull box dimensions.
Wire Weight Calculator
Calculate weight of copper and aluminum wire for project planning.
Batch Wire Sizing Calculator
Paste or upload CSV to size multiple circuits in one pass.
Breaker Size Calculator
Calculate breaker size and matching wire gauge from load and derating inputs.
Parallel Conductors Calculator
Size parallel feeder conductors and download passing arrangements as CSV.
Ground Wire Size Calculator
Size equipment grounding conductors from breaker rating and upsizing rules.
Neutral Wire Size Calculator
Estimate neutral conductor size from calculated neutral load, material, and voltage drop.
Extension Cord Size Calculator
Choose a practical extension cord gauge from load current, length, and voltage drop target.
EV Charger Wire Size Calculator
Size EVSE branch-circuit wire and breaker from charger current, run length, and derating inputs.
Motor Wire Size Calculator
Plan motor branch-circuit conductor size from FLC or MCA, derating, and voltage drop.
Transformer Wire Size Calculator
Size transformer primary and secondary conductors from kVA, voltage, and run length.
3 Phase Wire Size Calculator
Size three phase conductors from amps, kW, kVA, run length, material, and voltage drop.
Solar Wire Size Calculator
Size PV conductors from module Isc, string count, voltage, run length, and voltage drop.
Wire Resistance Calculator
Calculate electrical resistance based on gauge, length, and material.
Cable Size Calculator
Comprehensive cable sizing for residential and commercial applications.
Accurate & Reliable
Industry-standard formulas compliant with NEC requirements.
Easy to Use
Simple interfaces for professionals and DIY enthusiasts.
Comprehensive
From basic wire sizing to advanced cable calculations.
100% Free
No registration required. Access anytime, anywhere.
Residential Wiring
Commercial Systems
Industrial Power
Solar Installations
EV Charging
Marine Systems
RV & Mobile Homes
DIY Projects