About us

Davided gathers calculators from every corner of life — health, money, work, math and everyday questions. Results update live as you type, and advanced options cover the edge cases that simple tools skip.

Our signature feature is anonymous comparisons: for many calculators you can see how your result stacks up against other users — on a histogram, with your percentile. The data behind those comparisons is collected without any identifiers, so nobody (including us) knows which result belongs to whom.

Every calculator ships with a set of reference cases — calculations whose expected results were verified independently against the sources. The whole suite runs on every code change; if a single case disagrees, the change does not go live.

On each calculator page you will find the sources we rely on and the date of the last review. And if something still looks off, every calculator has a “Report a correction” button — we read every report.

The character showing you around is David — our mascot and the origin of the name (David + divided). He changes outfits depending on the category and makes sure numbers never get boring.

Questions, ideas for new calculators, feedback? Write to kontakt@davided.pro or see the contact page.