Wire Gauge Calculator
Determine the appropriate wire gauge for electrical circuits based on current and distance.
Wire Gauge Calculator
Determine the appropriate wire gauge for electrical circuits based on current, distance, and voltage requirements.
Recommended Wire Gauge
Voltage Drop
Safety Notes
- • Always consult local electrical codes
- • Consider ambient temperature factors
- • Use proper conduit and protection
- • Have work inspected by qualified electrician
AWG Wire Gauge Reference
| Wire Gauge | Max Current (Amps) | Diameter (mm) |
|---|---|---|
| 14 AWG | 15 A | 1.63 mm |
| 12 AWG | 20 A | 2.05 mm |
| 10 AWG | 30 A | 2.59 mm |
| 8 AWG | 40 A | 3.26 mm |
| 6 AWG | 55 A | 4.11 mm |
| 4 AWG | 70 A | 5.19 mm |
| 2 AWG | 95 A | 6.54 mm |
| 1 AWG | 110 A | 7.35 mm |
| 1/0 AWG | 125 A | 8.25 mm |
| 2/0 AWG | 145 A | 9.27 mm |
| 3/0 AWG | 165 A | 10.4 mm |
| 4/0 AWG | 195 A | 11.68 mm |
About This Calculator
Choose suitable wire size based on current and run length to minimize overheating and voltage drop risks.
Formula
Ampacity and voltage-drop sizing based on current, distance, and conductor material.
Example
Input current demand and distance to compare recommended conductor gauges.
When to Use
- Residential wiring planning
- Automotive electrical installs
- Panel and branch circuit design
Best Practices
- Round only for display; keep intermediate precision while exploring.
- If you paste values from PDFs, re-type critical digits to avoid OCR errors.
- When results look surprising, verify whether defaults or toggles changed.
FAQ
How do I interpret Wire Gauge Calculator output responsibly?
Treat it as guidance from standard formulas; combine with domain expertise and primary sources.
Why might my result differ slightly from textbook examples?
Textbooks often round mid-step; calculators may keep more precision unless configured otherwise.
Important Note
Results are informational and should be independently verified for legal, medical, engineering, or financial use.
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