Reference Charts
Quick-lookup engineering charts for PCB design, component selection, and everyday lab work.
AWG Wire Gauge Chart
Diameter, cross-sectional area, resistance per meter, and current capacity for AWG 0000 through AWG 40.
WiringPCB Trace Width Calculator
IPC-2221 standard trace width vs. current for 1oz and 2oz copper, external and internal layers.
PCB DesignSMD Resistor Code
3-digit and 4-digit EIA-96 SMD resistor marking decoder. 0603, 0805, 1206 package codes.
ComponentsCapacitor Value Codes
Ceramic capacitor 3-digit code to pF/nF/μF conversion. Tolerance and voltage rating markings.
ComponentsResistor Color Code
4-band, 5-band, and 6-band resistor color code charts with tolerance and temperature coefficient.
ComponentsMore reference charts coming soon. Suggest a chart →