Age Calculator and Date Difference Tool

A simple local tool for resumes, forms, anniversaries, deadlines, and quick date checks.

TimeNo uploadNo storage

Dates are not sent to SMARTWAY servers. All calculations run in your browser.

Birth date Reference date Start date End date

Enter dates to calculate.

Age - -

Until next birthday - -

Date difference - -

FAQ

Are my dates uploaded?

No. The calculation runs locally in your browser.

How are leap-day birthdays handled?

For February 29 birthdays, non-leap-year next birthdays are treated as February 28.

Can I use it for official paperwork?

Use it as a reference. If a law or form has a strict rule, confirm the rule with the relevant office.