Working calculators for subnet, IP range, bandwidth, latency, file transfer time, and Wi-Fi signal strength.
Whether you're a network administrator, IT student, or home user setting up a network, our free networking calculators help you plan, troubleshoot, and optimise your infrastructure. All calculations are instant and processed locally in your browser.
Subnetting is the practice of dividing a network into smaller, manageable segments. Our subnet calculator helps you determine network addresses, broadcast addresses, and usable host ranges based on an IP address and CIDR notation. Understanding subnet masks (e.g., /24 = 255.255.255.0) is essential for efficient IP address management and network security.
Bandwidth (measured in Mbps or Gbps) determines how much data can be transferred per second. Our bandwidth calculator helps you estimate required speeds for specific applications — for example, streaming 4K video requires approximately 25 Mbps, while video conferencing needs 3-5 Mbps. The file transfer time calculator shows exactly how long it will take to download or upload files of any size, helping you plan large data migrations.
Latency (measured in milliseconds) is the delay between sending and receiving data. High latency causes lag in gaming, video calls, and real-time applications. Our latency estimator calculates theoretical minimum latency based on physical distance and propagation speed (approximately 70% of light speed through fibre optics).
Wi-Fi signal strength decreases with distance and is affected by frequency. The 2.4 GHz band travels farther but is more congested; 5 GHz offers faster speeds but shorter range. Our Wi-Fi signal calculator estimates path loss — the reduction in signal strength over distance — helping you plan access point placement for optimal coverage.
All calculators are free to use, with no signup or personal information required. Bookmark this page for quick access during network planning and troubleshooting.