About | Universal Date Calculator

Why this exists

Many date calculators bury the answer under pop-ups, ask you to sign up, or hide how a result was reached. Universal Date Calculator does one thing differently: it works out days, weeks, workdays, ages and weekdays instantly and for free, states its counting rules openly, and has nothing to sign up for.

How the calculator works

Your dates are processed entirely inside your own browser, using standard JavaScript. Nothing you enter is ever transmitted to any server — not even anonymised. Once the page has loaded, you can disconnect from the internet and the calculator works just the same.

How it stays free

This site is supported by advertising. There is no premium tier and no feature held behind a paywall — the ads are what make every part of the tool free and unlimited.

Privacy by design

Dates can say a lot about you — a birthday, a due date, a contract, a trip. This tool was built so that it cannot see them: the code runs in your browser, the results stay in your browser, and no date leaves your device. There are no analytics that track what you entered.

Part of the Universal family

Universal Date Calculator is one of several free utility tools built on the same principle: solve one real problem well, keep it free, and respect your time. All tools share the same clean, fast design with no dark patterns, no upsells, and no friction.

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