Signal Integriry
Calculate the required trace width for a specified current
https://www.eeweb.com/tools/external-pcb-trace-width
Calculate the maximum current of an internal trace
https://www.eeweb.com/tools/internal-pcb-trace-max-current
Creepage
https://pcbdesign.smps.us/creepage.html
Characteristic Impedance of Traces
https://www.eeweb.com/tools/microstrip-impedance
Characteristic Impedance of Cable
https://www.eeweb.com/tools/coax
Crosstalk
https://www.eeweb.com/tools/microstrip-crosstalk
RLC Calculator
PCB Trace Resistance Calculator
https://www.eeweb.com/tools/trace-resistance
Inductance Calculator
https://www.eeweb.com/tools/wire-self-inductance-calculator
Capacitance Calculator
https://chemandy.com/calculators/rectangular-capacitor-calculator.htm
Losses
Microstrip Line Loss
https://www.microwaves101.com/calculators/1201-microstrip-calculator
Strip Line Loss
https://www.microwaves101.com/calculators/1202-stripline-calculator
Cable Loss
https://www.timesmicrowave.com/Calculator
Losses
Microstrip Line Loss
https://www.microwaves101.com/calculators/1201-microstrip-calculator
Strip Line Loss
https://www.microwaves101.com/calculators/1202-stripline-calculator
Cable Loss
https://www.timesmicrowave.com/Calculator