How it works
MTU / MSS Calculator is designed to give you the result immediately. The calculation or processing happens on your device for this tool, so normal use does not require an account or a file upload.
Privacy
This tool is marked offline-capable. Your inputs are used in the current browser/app session and are not required to be sent to Wiunix Tools to perform the operation.
Calculate MTU, TCP MSS and UDP payload overhead
Estimate TCP MSS or available UDP payload after IPv4/IPv6 and configured encapsulation overhead. The result is protocol math, not live path-MTU discovery.
- IPv4 / IPv6
- TCP MSS
- UDP payload
- Encapsulation overhead