WIRE GAUGE CALCULATOR
// FREE AWG SIZE CALCULATOR // NEC COMPLIANT // VOLTAGE DROP ANALYSIS //
*Al is ~30-40% cost of Cu, but requires upsizing.
Standard Breaker Sizes (Amps)
*Always size breaker to protect the weakest link.
| Size (EMT) | #12 THHN | #10 THHN |
|---|---|---|
| 1/2" | 9 | 5 |
| 3/4" | 16 | 10 |
| 1" | 26 | 16 |
NEC 310.15(B)(16): Allowable Ampacities of Insulated Conductors.
NEC 240.4(D): Small Conductor Protection (14AWG=15A, 12AWG=20A, 10AWG=30A).
- Garage Subpanel60A / 240V / 25m
- Kitchen Island20A / 120V / 12m
- AC Unit30A / 240V / 5m
NEC Compliant
Calculations align with NEC 310-16 standards for maximum safety.
Material Data
Auto-correction for Copper vs Aluminum resistivity profiles.
Drop Protection
Immediate alerts when voltage drop exceeds the critical 3% threshold.
Safe Capacity
Verifies load against maximum allowable ampacity per gauge.
HOW_TO_USE
// CALCULATE WIRE GAUGE IN THREE STEPS //
1. INPUT_SPECS
Enter voltage, current, distance, and material. Or select a quick scenario.
2. INSTANT_CALC
Results update in real-time. No button clicking needed.
3. GET_RESULT
Receive NEC-compliant AWG size with voltage drop analysis.
ABOUT_SYSTEM
// COMPREHENSIVE WIRE SIZING TOOL //
Our wire gauge calculator helps electricians, engineers, and DIY enthusiasts determine the correct AWG wire size for any electrical application. The calculator considers voltage, current, wire length, and conductor material to ensure your selection maintains voltage drop below the NEC-recommended 3% threshold.
Whether you're installing an EV charger, running a subpanel to your garage, or wiring a new kitchen circuit, proper wire sizing is critical for safety and code compliance.
DISTRIBUTE_TOOL
Help others calculate the correct wire gauge. Share this free tool with colleagues and friends.