Subnet, CIDR, MTU, and DNS calculators. Browse our free networking tools below — all calculators are instant, accurate, and require no sign-up.
API Rate Limit Calculator — Calculate API rate limit budgets, burst allowances, and throttling thresholds for effective API traffic management.
CIDR to IP Range Calculator — Convert CIDR notation to first and last IP addresses, total host count, and subnet mask. Supports all IPv4 prefixes.
DNS TTL Impact Calculator — Calculate the impact of DNS TTL values on propagation time, resolver cache hit rates, and DNS query volume.
MTU Size Calculator — Calculate optimal MTU size, payload capacity, and overhead for different encapsulation types including VXLAN, GRE, and IPsec.
IP Address Count Calculator — Calculate total and usable IP addresses for any CIDR range. Plan IP allocation for VPCs, subnets, and networks.
Subnet Calculator — Calculate subnet mask, network address, broadcast address, and usable host range from an IP address and CIDR prefix.
Network Latency & Throughput Calculator — Calculate file transfer time and effective throughput from bandwidth, latency, and protocol overhead for network planning.
TCP Window Size Calculator — Calculate optimal TCP window size and maximum throughput based on bandwidth and round-trip latency (bandwidth-delay product).
VLAN Capacity Calculator — Calculate VLAN capacity and plan broadcast domain sizing based on host count, traffic patterns, and performance targets.
Webhook Retry Cost Calculator — Calculate the infrastructure and compute cost of webhook delivery retries with exponential backoff strategies.