PCB Trace Width & Current Capacity Calculator
Calculate maximum safe current carrying capacity (Amperes), trace resistance, voltage drop, and power loss for external and internal PCB layers based on IPC-2221 standards.
Typical consumer PCB: 10°C–20°C; Industrial: ≤ 10°C
IPC-2221 Results
| Max Current Capacity Imax | — A |
| Cross-Section Area A | — mil² (— mm²) |
| Trace Resistance R | — mΩ |
| Voltage Drop ΔV at Imax | — mV |
| Power Loss Ploss | — W |
IPC-2221 Formulas
External: I = 0.048 × (ΔT)0.44 × (A)0.725
Internal: I = 0.024 × (ΔT)0.44 × (A)0.725
A = Trace Width (mil) × Thickness (mil)