https://github.com/kernferm/subnet-calculator
A modern, user-friendly GUI tool for calculating and visualizing IPv4/IPv6 subnets. Easily analyze networks, split into subnets, and check IPs for IT professionals, students, and enthusiasts.
https://github.com/kernferm/subnet-calculator
enthusiasts professional students subnet-calculator user-friendly-interface
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A modern, user-friendly GUI tool for calculating and visualizing IPv4/IPv6 subnets. Easily analyze networks, split into subnets, and check IPs for IT professionals, students, and enthusiasts.
- Host: GitHub
- URL: https://github.com/kernferm/subnet-calculator
- Owner: KernFerm
- License: other
- Created: 2025-07-19T06:56:08.000Z (3 months ago)
- Default Branch: main
- Last Pushed: 2025-07-19T07:35:14.000Z (3 months ago)
- Last Synced: 2025-07-19T11:27:38.542Z (3 months ago)
- Topics: enthusiasts, professional, students, subnet-calculator, user-friendly-interface
- Language: Python
- Homepage:
- Size: 48.8 KB
- Stars: 1
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Contributing: CONTRIBUTING.md
- License: License
- Code of conduct: CODE_OF_CONDUCT.md
- Security: SECURITY.md
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README
# Subnet Calculator
**A modern, user-friendly GUI tool for calculating and visualizing IPv4/IPv6 subnets. Easily analyze networks, split into subnets, and check IPs for IT professionals, students, and enthusiasts.**
---
## 🚀 Features
- **IPv4 & IPv6 support**: Calculate subnets for both address types.
- **CIDR and netmask input**: Accepts both CIDR notation (e.g. `192.168.1.0/24`) and netmask (e.g. `255.255.255.0`).
- **Subnetting**: Split a network into smaller subnets with a chosen prefix length.
- **IP Lookup**: Check if an IP address belongs to the calculated network.
- **Export results**: Save results as TXT, CSV, or JSON for easy sharing or analysis.
- **Copy to clipboard**: Quickly copy results for use elsewhere.
- **Recent calculations history**: View your last 10 calculations.
- **Network visualization**: See a graphical representation of your network and host range.
- **Theme switching**: Choose between Light, Dark, or System themes.
- **Keyboard shortcuts**: Fast access to common actions.
---
## 🖥️ Requirements
- Python 3.11+ (Tested on Python 3.11.9)
- [customtkinter](https://github.com/TomSchimansky/CustomTkinter)
Install dependencies:
```bash
pip install customtkinter>=5.2.2
```
---
## 📦 Installation
1. **Clone this repository:**
```bash
git clone https://github.com/KernFerm/Subnet-Calculator.git
cd subnet-calculator
```
2. **Install dependencies:**
```bash
pip install customtkinter
```
3. **Run the app:**
```bash
python subnet_calculator.py
```
---
## 📝 How to Use
1. **Enter an IP address or CIDR notation** in the Network Input section (e.g. `192.168.1.0` or `192.168.1.0/24` or `2001:db8::`).
2. **Enter a prefix length** (e.g. `24` for IPv4, `64` for IPv6) or a netmask (IPv4 only).
3. **Select IP version** (IPv4 or IPv6).
4. Click **Calculate** or press `Ctrl+R` to compute results.
5. View results in the Results section:
- Network address
- Netmask
- Wildcard mask
- Broadcast address (IPv4)
- Total hosts
- Host range
6. Use **Subnetting** to split the network into subnets:
- Enter a subnet prefix length greater than the main network's prefix.
- Click **Show Subnets** to view all subnets and their host ranges.
7. Use **IP Lookup** to check if an IP is in the network.
8. **Export results** using the File menu or Export buttons (TXT, CSV, JSON).
9. **Copy results** using the Copy buttons or Edit menu.
10. **Change theme** in the View menu.
11. **See recent calculations** in the right panel.
---
## ⌨️ Keyboard Shortcuts
- `Ctrl+C`: Copy Network
- `Ctrl+E`: Export Results
- `Ctrl+R`: Calculate
---
## 📤 Export Formats
- **TXT**: Human-readable results
- **CSV**: For spreadsheets
- **JSON**: For scripts and automation
---
## ❓ Troubleshooting
- If the app does not start, ensure you have Python 3.11.9 and `customtkinter` installed.
- For display issues, try switching themes in the View menu.
- For errors with IP or mask input, check the format and refer to the help section in the app.
---
## 🤝 Contributing
Contributions, suggestions, and bug reports are welcome! Please open an issue or submit a pull request.
---
## 📄 License
```
Learning License
===============
This software is provided for educational and personal learning purposes only.
You are free to use, modify, and share this code for non-commercial, instructional, & self-study activities.
Restrictions:
- Commercial use, distribution, or resale is not permitted.
- No warranty is provided; use at your own risk.
- Please credit the original author if sharing or adapting the code.
For other uses, please contact the author for permission.
```