⚡ Conductor Sizing Tool
Wire Gauge Calculator
Find the correct AWG wire size for any lighting or electrical circuit. Checks both NEC ampacity and voltage drop — takes the larger of the two. Always the right answer, never just the cheaper one.
Safety note: Undersized wire doesn’t just fail — it overheats. This tool uses NEC ampacity tables and voltage drop calculations. Always verify with a licensed electrician for permanent installations.
Application
Load
Total Load (W)
Total wattage of all fixtures
System Voltage (V)
Load Type
Lighting = continuous (3+ hrs)
Phase
Run Distance
One-Way Run Length (ft)
Panel to furthest fixture
Max Voltage Drop (%)
Conductor
Wire Material
Installation Method
Recommended wire size
— AWG
Copper · 75°C rated
—
Voltage drop at recommended size
—
—%
—
0%3%5%8%10%+
Load Current
—
amps
Voltage Drop
—
volts lost
End Voltage
—
V at load
Sized By
—
limiting factor
Visual wire size comparison
Relative conductor cross-section — larger AWG number = thinner wire
Gauge
Relative size
Max amps
Typical use
Why this wire size?
—
Wire gauge quick reference
| AWG | Max amps (75°C Cu) | Resistance Ω/1000ft | Circ. mils | Typical application |
|---|