About devcalcs
devcalcs is a focused collection of calculator and conversion tools for developers and designers — the kind of utilities you reach for mid-task and want answered in seconds.
Why it exists
Most online dev calculators are slow, ad-saturated, or buried under popups asking you to subscribe to a newsletter. The simple act of converting a pixel value to rem deserves better than that. devcalcs is built around a single principle: a tool should give you the answer faster than the page took to load.
What it is
A focused set of tools. Each one does a single job well: type a value, get a result, copy it, get back to your work. No accounts. No sign-ups. No upsells. Everything runs locally in your browser — your inputs never leave your device.
What it’s not
- A blog
- A SaaS product
- A platform
- An “AI-powered” anything
Just calculators. Built carefully.
What’s coming
The roadmap includes more CSS unit converters (em ↔ px, vh/vw → px, aspect ratio), colour conversions (hex ↔ RGB ↔ HSL), data unit conversions (bytes / KB / MB / GB), and a handful of dev utilities (cron expression decoder, regex tester, timestamp converter). New tools land when they’re ready, not on a schedule.
If there’s a calculator you wish existed, let us know.
A note on funding
If you see ads on the site, they’re how it stays free, fast, and online. We try to keep them tasteful and unobtrusive. If they’re ever annoying, tell us— we’d rather know.