AWG Wire Gauge Calculator
Convert AWG wire gauge to diameter (mm/inches), cross-sectional area (mm²), resistance per meter, and approximate current carrying capacity.
Formula
How It Works
The American Wire Gauge (AWG) system is a standardized method for specifying wire diameter and cross-sectional area used in electrical and telecommunications engineering. The AWG scale uses a logarithmic formula to calculate wire dimensions, with each step representing a precise reduction in wire diameter. This system allows engineers and electricians to precisely determine wire characteristics like diameter, cross-sectional area, electrical resistance, and current-carrying capacity.
Worked Example
Problem: Calculate the diameter, cross-sectional area, and current capacity for AWG 10 wire Solution: 1. Diameter (inches): d = 0.005 × 92^((36-10)/39) = 0.1019 inches 2. Diameter (mm): 0.1019 × 25.4 = 2.59 mm 3. Cross-sectional area: π(2.59/2)² = 5.27 mm² 4. Current capacity: 7 × (5.27)^0.726 ≈ 15.3 A
Practical Tips
- ✓Always verify wire rating for specific application requirements
- ✓Consider temperature and insulation when selecting wire gauge
- ✓Use proper safety margins when calculating current capacity
- ✓Check manufacturer specifications for precise wire characteristics
Common Mistakes
- ✗Confusing AWG number with actual wire diameter
- ✗Not accounting for temperature effects on current capacity
- ✗Using incorrect conversion factors
- ✗Neglecting wire material conductivity variations
Frequently Asked Questions
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