SimpleConvert is a collection of 713+ free calculators, converters and small utilities — things like unit converters, loan and interest calculators, text tools, QR and barcode generators, image tools, and an electrical and lighting calculator set, alongside the tally counter cluster. There is no sign-up, no account, and nothing to install.
Why it's built this way
Almost every tool on this site runs entirely in your browser. When you convert a unit, calculate a loan payment, generate a QR code, resize an image or check a barcode, the JavaScript doing that work is already sitting on your device — the input never gets sent to a server, because there is no reason for it to be. That is a deliberate design choice, not an accident: it is faster (nothing waits on a network round trip), it works offline once a page has loaded (a service worker caches pages for exactly this), and it means there is nothing sensitive about what you type into a calculator for us to protect, leak, or hand over, because we never receive it.
There are two narrow, named exceptions to that, and both are covered in full on the privacy policy: the URL shortener has to store a destination URL somewhere for the short link to work at all, and — if page-view analytics is switched on — a first-party, cookie-free analytics system records which paths get visited, in aggregate, with no personal data attached.
How the tools work
Each tool is a small, self-contained page: type or paste something in, and the calculation, conversion or transformation happens immediately as you go, using ordinary client-side JavaScript. A few tools keep a working copy of what you are doing in your browser's own storage (localStorage) — your theme choice, a list of recently used tools, counter totals, or the contents of the notepad and to-do list tools — purely so it is still there if you come back or reload the page. That storage lives only on your device; it is never transmitted anywhere.
Who it's for
Anyone who wants a quick, correct answer without creating an account, installing an app, or wondering what happens to the numbers they typed in. That includes students checking a grade calculation, electricians sanity-checking a wire size on site, people converting units for a recipe or a DIY project, and anyone who just wants a calculator that opens fast and gets out of the way.
Results are provided for convenience and should be checked against authoritative sources before being relied on for anything important — see the disclaimer for specifics, particularly around the electrical and wire-sizing tools.
Advertising
This site may show ads (including Google AdSense) to cover hosting costs. Ads are never a prerequisite for using a tool, and any advertising cookies only load after you accept them in the cookie banner — see the cookies page for details.
Questions
Found a wrong result, a broken tool, or want to request one that doesn't exist yet? See the contact page.