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Find the right calculator in seconds

There are more calculators than you will ever need at once. Three small habits make the one you do need appear instantly.

  1. 1Search the way you speak

    The search box at the top understands everyday phrases, not just math terms. Type “20% off”, “tip” or “rent hike” and the matching calculator surfaces before you finish the word.

    The Just Percent home screen with the search box and calculator cards

  2. 2Star what you actually use

    Every card has a star in its corner. Star the two or three you reach for, tap the star filter in the top bar, and the home screen shrinks to your personal set. The choice is stored in your browser — on your device, nowhere else.

    The home screen filtered down to starred calculators

  3. 3Read the work, not just the answer

    Open the Equation panel and the app writes the formula out with your own numbers in it. Thirty seconds of reading, and next time you can sanity-check the till — or your landlord — in your head.

    A worked percentage-change solution with the formula written out

That’s the whole tour

Search, stars, worked solutions. Everything else is just typing numbers.

Open Just Percent — it’s free