Networking Calculators

IP addressing, subnets, bandwidth, wireless, fiber, security and cloud networking tools.

Subnetting, CIDR, IPv4 and IPv6 address planning, bandwidth and latency calculations for network engineers and students. The subnet tools apply the mask with bitwise arithmetic and show network, broadcast and usable host ranges, so you can see how the answer was reached rather than copy it.

Throughput and capacity figures are theoretical maxima based on the inputs you give. Real links lose capacity to protocol overhead, retransmission and contention, so leave headroom when sizing anything that will carry production traffic.

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