PCB Trace Width Calculator
Calculate required PCB trace width based on IPC-2221 standard for current carrying capacity
Common Current Values
0.3 A (Signal)0.5 A (Low power)1 A (Medium power)2 A (Power)3 A (High power)5 A (Heavy power)10 A (Very heavy)
Input Parameters
= 35 µm = 1.38 mils
Based on IPC-2221 standard
A = (I / (k × ΔT^0.44))^(1/0.725)
k = 0.048 (External), 0.024 (Internal)
Results
External Layer
0.300 mm
11.8 mils
Cross-section: 16.3 mils²
Resistance: 0.0820 Ω
Voltage Drop: 81.99 mV
Power Loss: 81.99 mW
Internal Layer
0.781 mm
30.8 mils
Cross-section: 42.4 mils²
Resistance: 0.0315 Ω
Voltage Drop: 31.52 mV
Power Loss: 31.52 mW
External Trace Width Reference (1 oz, 10°C rise)
| Current | Width (mm) | Width (mils) |
|---|---|---|
| 0.5 A | 0.115 mm | 4.5 mils |
| 1 A | 0.300 mm | 11.8 mils |
| 2 A | 0.781 mm | 30.8 mils |
| 3 A | 1.367 mm | 53.8 mils |
| 5 A | 2.765 mm | 108.9 mils |
| 7 A | 4.399 mm | 173.2 mils |
| 10 A | 7.194 mm | 283.2 mils |