Net Calculator for Flipper Zero is an offline IPv4 VLSM subnet calculator designed specifically for Flipper Zero devices.

The application allows network calculations directly on Flipper Zero, without requiring a computer or an internet connection. It calculates subnet allocations based on a parent IPv4 network and the required number of usable hosts.

Net Calculator provides complete VLSM allocation results including subnet prefix, network address, first usable host, last usable host, and broadcast address.

GitHub repository: [Link]

Flipper LAB: [Link]

Features

• IPv4 VLSM subnet calculation
• Fully offline operation
• Designed for Flipper Zero
• Decimal IPv4 address input
• Parent prefix selection from /8 to /30
• Support for up to 16 subnet requests
• Automatic sorting from the largest to the smallest subnet
• Network address calculation
• First usable host calculation
• Last usable host calculation
• Broadcast address calculation
• Parent network overflow detection

Usage

The application uses a simple menu system designed for Flipper Zero.

• IP — enter the parent IPv4 address
• Prefix — select the parent network prefix
• Add host request — add required usable host count
• Requests — view or remove subnet requests
• Calculate — perform VLSM calculation
• Reset — restore default values

VLSM calculation

Each subnet reserves one network address and one broadcast address. The remaining addresses are treated as usable host addresses.

Requests are processed from the largest to the smallest subnet. This approach reduces address-space fragmentation and allows efficient allocation inside the parent network.

Example

Parent network: 192.168.1.0/24

Requested usable hosts:

• 100 hosts
• 50 hosts
• 20 hosts

Net Calculator automatically determines the required subnet sizes:

• 100 hosts → /25 subnet
• 50 hosts → /26 subnet
• 20 hosts → /27 subnet

The application then displays the complete allocation details for each subnet.

Download and source code

Net Calculator for Flipper Zero is available as an open-source project. The source code, installation information and project files are available on GitHub .

The project is published under the GNU General Public License version 3.

Project origin

Net Calculator for Flipper Zero is based on the original Net Calculator project and brings VLSM subnet calculations to Flipper Zero devices.

Disclaimer

Net Calculator for Flipper Zero is an independent third-party application for Flipper Zero.

Flipper Zero is a trademark of Flipper Devices Inc. This project is not affiliated with, sponsored by, endorsed by, or approved by Flipper Devices Inc.