Every internet tool you might need, in one place.
Pick the calculator that sounds like your question. Each one opens on its own page with the formula, a worked example and answers to the things people ask most.
Speed & transfer
9 tools
Data & storage
8 tools
Network & guides
3 tools
No tool matches that search. Try a shorter word such as “download” or “data”.
How to choose the right tool
Start with the question you are trying to answer. If you have a speed test result, the Internet Speed Calculator explains what it means. If you are about to download something large, the Download Time Calculator tells you how long to wait. For a monthly data plan, use the data usage tools, and for a slow or unstable connection use the ping and Wi-Fi tools together.
All calculations run in your browser and none of the numbers you enter are stored. The results are estimates: Wi-Fi conditions, equipment and congestion change real-world performance, so treat them as a planning baseline. For background on the terms, read the network guides or browse the blog.