UnitConverters.net has been a fixture of the unit conversion world for years. It covers a wide range of units, but the design hasn't been updated since the early 2010s, the navigation is cluttered, and there's no dark mode.
UnitSwiftPro is a modern alternative with a clean interface, 0 dedicated converter pages, and a focus on speed. This page compares the two so you can pick the right one for your needs.
★ Verdict
UnitConverters.net is a usable tool, especially if you're used to it. UnitSwiftPro is the better choice for new users and anyone who values modern design, faster page loads, and a wider selection of dedicated converter pages.
UnitConverters.net vs UnitSwiftPro
How the two tools stack up across the features that matter most.
| Feature | UnitConverters.net | UnitSwiftPro |
|---|---|---|
| Total dedicated converters | ~50 | 0 |
| Number of units | ~200 | 326+ |
| Years active | Since 2003 | Modern alternative |
| Modern UI design | No (dated) | Yes |
| Mobile responsive | Basic | Optimized |
| Dark mode | No | Yes |
| Conversion formulas shown | Sometimes | Always |
| Quick reference tables | Yes | Yes |
| Bulk / multi-value conversion | No | Yes |
| Number of ads per page | 5+ | 1–2 |
| Page load speed | Slow | Fast |
| Easy navigation | No (cluttered) | Yes (clean) |
| Free | Yes | Yes |
| Sign-up required | No | No |
Why UnitSwiftPro is the better choice
Six reasons most users prefer UnitSwiftPro for everyday conversions.
Modern design
UnitSwiftPro uses a contemporary visual language: large readable type, generous spacing, subtle animation, and a color palette designed for clarity.
0 dedicated pages
Every popular unit pair — kg to lbs, miles to km, celsius to fahrenheit — has its own page. Easier to bookmark, easier to share, easier to find via search.
Dark mode built in
UnitSwiftPro is dark by default. UnitConverters.net is light only. Dark mode is easier on the eyes and saves battery on OLED screens.
Designed for mobile
UnitSwiftPro is responsive down to 320px wide. UnitConverters.net works on mobile but feels squeezed.
Powerful search
Type "kg to lbs" or just "kilograms" into the search box and jump straight to the right converter. UnitConverters.net has no search.
Faster
UnitSwiftPro loads in under a second. UnitConverters.net can take 3–5 seconds on slow connections due to scripts and ad network calls.
Frequently asked questions
Try UnitSwiftPro free
0 converters, no sign-up, no fees. See for yourself why thousands of users prefer UnitSwiftPro.
Open the converter Browse all converters