CIDR Calc

MTU Finder

Compute safe payload sizes and infer MTU when DF ping succeeds at a given payload.

Target MTUIPv4 overhead (bytes)Largest DF payload that works

Results

MTU guidance

Suggested DF payload

1472 bytes

Inferred path MTU

1500 bytes

Tip: If DF pings fail above a certain payload, set MTU to payload + overhead.