Why is fragmentation generally undesirable?

Fragmentation adds processing overhead and increases the chance that losing a single fragment requires retransmitting the entire original packet, which is why protocols like TCP try to avoid it via path MTU discovery.

MTU Fragmentation Calculator

Calculate the number of fragments a network packet must be split into when its size exceeds the path's Maximum Transmission Unit (MTU).

Inputs

Results

Fragments Needed: 2

Try an example

Formula

Fragments = ceil(Packet Size / MTU)

Learn How This Works

Subnetting and IP Planning: Ranges, Fragmentation, and Subnet Counts

IP range size, MTU fragmentation, subnet count, IP-to-decimal conversion, and MAC address generation — five calculations for network address planning.

Frequently Asked Questions

Related Calculators

File Transfer Time Calculator

Calculate how long a file will take to download or upload at a given speed.

Round-Trip Latency Calculator

Calculate round-trip time from one-way network latency, or vice versa.

Subnet Calculator

Calculate network address, broadcast address, and host range from an IP and CIDR.

IP to Binary Converter

Convert an IPv4 address to its binary representation.

Wildcard Mask Calculator

Convert a CIDR prefix length to its wildcard mask, used in ACLs.

Hosts per Subnet Calculator

Calculate the number of usable hosts for a given CIDR prefix length.