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THE FEUTEX TOOLKIT

IPv4 Fragmentation Layout

Compute fragment count, aligned fragment payload and final fragment size.

Networking workspace● Runs in your browser
01 Your input
02 Your result
View or copy raw result data
FormulanonfinalPayload=8floor((MTU−header)/8)
Sources and model references

How to use this tool

  1. Enter the labeled inputs in the indicated units.
  2. Calculate and compare every output against the stated model assumptions.

Try this example

{
  "payload": 4000,
  "mtu": 1500,
  "header": 20
}

Accuracy and scope

Fragmentation permitted, identical header size in each fragment, no differing copied options. Simplified analytical model; not a design recommendation or safety certification.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.