IP Calculator

Convert between CIDR, IP addresses, and subnet masks in real-time

CIDR to Subnet Mask & IP Range

Enter CIDR value with or without slash (0-128) - IPv4: 0-32, IPv6: 0-128
Enter CIDR to see result
Enter CIDR to see result
Enter CIDR to see result
Enter CIDR to see result

IP Address & Subnet Mask to CIDR

IPv4 or IPv6 address Corresponding subnet mask
Enter IP and Mask to see result

Supported Conversions

  • IPv4: CIDR to subnet mask and IP range
  • IPv6: CIDR to subnet mask (IP range calculation available)
  • Bidirectional: IP address and subnet mask to CIDR

Note: IPv6 IP range calculation is simplified. Full implementation may vary.