MTU & MSS Calculator
Calculate Effective MTU and TCP MSS based on network encapsulation.
Local processing
This tool processes your input in your browser.
[IN] Input config
Standard Ethernet is 1500; jumbo frames are commonly up to 9000.
Select the IP header used for the MSS calculation.
Enable every overhead layer present on the path.
[OUT] Results _
Effective MTU1500Bytes usable for IP packet
TCP MSS1460Bytes usable for TCP payload
Packet structure
IP
TCP
PAYLOAD (MSS: 1460)
Link MTU: 1500
- Encapsulation Overhead: 0
= Effective MTU: 1500
- IP Header (ipv4): 20
- TCP Header: 20
= MSS: 1460
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