Accuracy that looks good.
I built JustPercent out of simple frustration: most online calculators are ugly, clunky, and stuck in the 90s. I wanted a tool that didn't just crunch numbers, but felt good to use—whether you're quickly checking a tip on your phone or planning your monthly budget.
Built for Speed
Everything here has one job: get you the answer, fast.
- • Intuitive Navigation: Find exactly the calculator you need without digging.
- • Instant Results: Pages load fast. No waiting around.
- • Easy Inputs: Smart inputs and buttons that make entering data feel natural.
Design That Feels Good
I ditched the complex, outdated forms that clutter the web.
- • Looks: Clean, modern, and actually pleasant to look at.
- • Dark Mode: Full dark mode support, so it's easy on your eyes at night.
- • Focus: An interface designed to keep your attention right where it matters: the result.
- • Visual transparency: Some illustrative visuals may be generated or assisted by AI tools and are used only to support the design and explanations.
Engineered for Accuracy
Trust is everything when it comes to numbers.
- • Financial Precision: I use decimal-safe math to eliminate common rounding errors.
- • Transparent Formulas: I show the exact formula used for every calculation, so you always know how the answer was found.
- • Private by Design: All math happens locally in your browser. Your numbers never leave your device. Learn more in the Privacy Policy.
JustPercent is built with a passion for the modern web.
Owned and operated by:
Bilargo — Michał Lipski
Aleja Partyzantów 51A
24-100 Puławy, Poland
Have a question or feedback? Reach out to me:
[email protected]