PCB Signal Propagation Delay Calculator
Calculate signal propagation delay in PCB traces based on dielectric properties.

Calculation Results:
Signal Propagation Delay:
About PCB Signal Propagation Delay Calculator:
This calculator helps determine the time delay a signal experiences while traveling through PCB traces. Understanding propagation delay is crucial for high-speed digital design and signal timing synchronization.
Formula Used:
Propagation Delay is calculated using:
- Propagation Velocity = c/√εr
- Delay = Length/Velocity
- Where:
- c = Speed of light (299,792,458 m/s)
- εr = Dielectric constant
- Length = Trace length
Common Dielectric Constants:
- FR4: εr = 4.2-4.8
- Rogers RO4350B: εr = 3.48
- PTFE (Teflon): εr = 2.1
When designing PCBs, proper annular ring width is crucial for reliable through-hole connections. This PCB Annular Ring Width Calculator helps engineers optimize pad and hole dimensions. For comprehensive PCB design, you'll also need tools like the PCB Trace Resistance Calculator to minimize power loss, and the PCB Via Size and Current Capacity Calculator to ensure proper current handling. High-speed designs require the PCB Impedance Calculator and PCB Differential Pair Impedance Calculator for maintaining signal integrity. For manufacturing reliability, use the PCB Solder Mask Expansion Calculator to determine proper mask openings, while the PCB Heat Dissipation & Thermal Resistance Calculator helps optimize thermal management. Don't forget to check parasitic effects with the PCB Capacitance Calculator and PCB Inductance Calculator. These free tools work together to help you create reliable, high-performance PCB designs.