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Wireguard Allowed IPS Calculator

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In the realm of virtual private networks (VPNs), Wire Guard stands out for its simplicity and efficiency. However, setting it up requires precise configuration, particularly when determining which IP addresses are permitted through the tunnel. This is where the WireGuard Allowed IPs Calculator comes into play. Designed to simplify network management, this tool automates the calculation of CIDR (Classless Inter-Domain Routing) notation, ensuring your WireGuard setup is both secure and efficient.

Understanding the Calculator's Purpose and Functionality

The WireGuard Allowed IPs Calculator is a specialized tool intended to streamline the configuration process of WireGuard VPNs. By inputting a starting IP address and the total number of consecutive IP addresses you wish to include, the calculator provides you with a CIDR notation. This notation is crucial for defining the range of allowed IPs for a WireGuard peer, thus determining the network's boundaries and ensuring that traffic is appropriately routed through the VPN.

How It Works: A Step-by-Step Guide

Let's break down the process into easy-to-understand steps:

  1. Input the Starting IP Address: Enter the initial IP address of the range you wish to route through the WireGuard tunnel. For example,
  2. Specify the Number of Addresses: Indicate how many consecutive IP addresses, starting from the one you provided, should be included. For instance, 256.
  3. Calculation Using the Formula: The calculator applies the formula CIDR = 32 - log2(num_addresses) to determine the CIDR notation for the subnet mask of the specified range.
  4. Interpret the Results: The output will be a CIDR notation, such as, indicating the allowed IP range for the WireGuard configuration.

Practical Example

Imagine you're setting up a WireGuard VPN and decide to start with the IP address, aiming to include a total of 256 addresses in this range. By inputting these values into the calculator:

  • IP Address:
  • Number of Addresses: 256

The calculator performs the magic:

  • Calculation: CIDR = 32 - log2(256) = 24
  • Allowed IP Range:

This means your WireGuard tunnel will securely route traffic for IP addresses from to

Relevant Information Table

Input ParameterExample ValueDescription
Starting IP Address192.168.1.1The beginning IP address of the allowed range.
Number of Addresses256The total number of consecutive IPs to include.
CIDR Notation Output/24The calculated CIDR notation for the subnet mask.


In summary, the WireGuard Allowed IPs Calculator is an invaluable asset for anyone working with WireGuard VPNs. It simplifies a complex part of the configuration process, ensuring your network is both secure and efficient. With this tool, managing your VPN's allowed IP ranges has never been easier.

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