PCB Trace Calculator

Calculate trace width and current capacity according to IPC-2221 standard

📥 Input Values

Current (I)

Temperature Rise (ΔT)

°C

Typical: 10°C safe, 20°C normal, 45°C maximum

Copper Thickness

Layer Type

Trace loss calculation (optional)

Trace Length

Ambient Temperature

°C

Minimum Trace Width0.302 mm

= mils11.9 mil

Max. Trace Temperature35°C

Trace Resistance86.82 mΩ

Voltage Drop86.82 mV

Power Loss86.82 mW

📐 IPC-2221 Standard

Outer layer conductors can carry ~2x more current than inner layers (air cooling).

Add 20-50% margin to the calculated width for safe design.