How this works
One-way delay (ns) = length (mm) / propagation velocity (mm/ns). Picoseconds = nanoseconds × 1000.
Timing & interfaces / T044
Trace propagation estimate
Convert a physical trace length to delay using an explicitly supplied propagation velocity.
Browser-local calculations Your inputs are processed on this device.Visible methods & limits Check assumptions before using a result.Explicit sharing Send a project only after reviewing the RFQ.
01 / DEFINE THE REQUIREMENT
Design inputs
02 / REVIEW THE OUTPUT
Your result
Ready for an example run. Check the inputs, then run the tool.
One-way delay from length and stated velocity
- Confirm the values and units.
- Run the check to generate your output.
- Review limitations before exporting or sharing.
Calculation & record
Review before use
The report records the tool version and calculation time. Project enquiry opens a separate form for your review; it does not submit automatically.
03 / METHOD & VERIFICATION
Understand the result.
Method version 1 · 2026-09-27
FPGA.io planning aid. Arithmetic and checklist output do not replace device documentation, a design tool or engineering approval.
Inputs and limits
Length 0–10,000,000 mm; velocity 0.001–299.792458 mm/ns. Use the actual stack-up assumption, not an implicit dielectric constant.
Verification example
150 mm at 150 mm/ns → 1 ns (1000 ps).
Use the example inputs to inspect how the method behaves. This is a reference calculation, not a hardware test.
Data handling & review
Calculations and pasted lists stay in this browser. No account is required. An enquiry brief is stored temporarily in this tab's session only when you choose to transfer it.
Report a method or input issue →04 / CONTINUE THE TASK
Take the next useful step.
Keep exact device and board revisions with the assumptions you just checked.