About calcetera

calcetera is a growing library of small, dependable online tools: calculators, converters, text utilities and more. The idea is simple — the little things you occasionally need to work out should be one search away, load instantly, and just work.

What makes it different

• Fast and light. Pages are mostly static and load quickly, even on a phone.
• Private by default. Tools run in your browser; we don’t send your input to a server.
• No clutter. No sign-ups, no walls of pop-ups, no demands before you can use a tool.
• Multilingual. Tools are available in several languages, with more added over time.

How it’s funded

calcetera is free to use. To keep it that way we show advertising, and — only with your consent — measure aggregate traffic so we can see which tools are useful and improve them. You can change your choices at any time from Cookie settings in the footer.

We’re just getting started, and the collection grows constantly. Thanks for stopping by.