/products/units-conversion
Units Conversion
A privacy-first units converter with 307 units across 27 categories. All conversion math runs inside your browser. 39 languages, no server round-trip, and no logging of what you convert.
What it is
Conversion across 27 categories: length, weight, area, volume, temperature, pressure, time, speed, energy, power, data storage, data transfer rate, fuel economy, angle, frequency, flow rate, force, illuminance, torque, density, cooking measurements, acceleration, charge, current, voltage, resistance, and dry volume. 307 distinct units with their own conversion formulas. Every conversion runs in your browser via JavaScript: you type a number, pick the source and target units, and see the result instantly. No login, no syncing, no premium tier. 39 languages from day one with localized category names and unit labels. A live search bar lets you jump straight to any converter by name or unit.
Why we built it this way
Look at what's out there: most online unit converters log your queries. Some of them sell that data, some of them just sit on it, but the calculator-as-tracker pattern is everywhere. A units converter is a calculator. A calculator shouldn't phone home. The math fits in a few hundred lines of JavaScript and runs faster than the network round-trip a server-side converter would need anyway. So we built one that doesn't ship your inputs anywhere, doesn't show ads keyed off what you converted, and doesn't try to upsell you on a Pro subscription with three extra unit categories. The converter lives at converter.ultim8soft.com and works the same way the developer tools do: static pages from a CDN, all logic in the browser, nothing to set up.
What's in it
Every converter has a hero widget on its category page with the two most common units pre-selected so you can convert right away. A full search bar (Cmd+K / Ctrl+K) covers every category, unit symbol, and localized name. The site generates ~11,000 pages: one for each combination of locale, category, and unit pair, with example conversions and reference notes. It's built on Astro, styled with the same Workshop Terminal palette as the tools site, and served from the same S3 + CloudFront setup. No backend. No database. No accounts.
Try the converter
The converter lives at converter.ultim8soft.com. Pick a category, type a number, see the result. All conversion math runs in your browser. No signup, no query logging, no server round-trip. Bookmark the categories you reach for most: the URLs are stable and the converters don't change shape between sessions.
Related links
While you're here, you can also check out the other live product or read the guides: