Professional PCB Trace Width Calculator
Calculate trace widths, current capacity, impedance, and more with industry-standard IPC-2221 formulas
Standard: IPC-2221
Trace Width Calculator
Calculate minimum trace width based on current requirements using IPC-2221 standard
Input Parameters
Amperes
°C above ambient
Results
Minimum Trace Width:
-- mm
Minimum Trace Width (mil):
-- mil
Cross-sectional Area:
-- mm²
Resistance per mm:
-- Ω/mm
Power Dissipation:
-- W/mm
Formula Used (IPC-2221)
External: Amil² = (I / (k × ΔTb))1/c
Internal: Amil² = (I / (k × ΔTb))1/c
Per IPC-2221, A is in mil². MorePCB converts results to mm² and mm for display.Standard: IPC-2221
Current Capacity Calculator
Calculate maximum current capacity for given trace dimensions
Trace Dimensions
°C
Results
Maximum Current:
-- A
Cross-sectional Area:
-- mm²
Current Density:
-- A/mm²
Resistance per mm:
-- Ω/mm
Standard: Industry (Microstrip/Stripline)
Impedance Calculator
Calculate characteristic impedance for microstrip and stripline traces
Microstrip Parameters
mm
mm
mm
Stripline Parameters
mm
mm
mm
Results
Characteristic Impedance:
-- Ω
Effective εr:
--
Propagation Delay:
-- ps/mm
Cross Section
Standard: IPC-2221 (approx)
Via Calculator
Calculate via current capacity and thermal characteristics
Via Parameters
mm
μm
mm
°C
Results
Maximum Current:
-- A
Via Resistance:
-- Ω
Cross-sectional Area:
-- mm²
Current Density:
-- A/mm²