Date converter tools

Date tools that run locally in your browser.

Age Calculator — Exact Age from Birth Date

Calculate exact age in years, months, and days from a birth date. Updates to today or any target date.

ISO 8601 Date Formatter

Parse and format ISO 8601 dates. Convert between ISO strings, local datetime, and Unix timestamps.

ISO Week Number Calculator

Find the ISO week number for any date. See week start, week end, and year-week label.

Business Days Calculator

Business Days Calculator. Free, instant, runs in your browser.

Working Hours Calculator

Working Hours Calculator. Free, instant, runs in your browser.

Countdown to Date Calculator

Countdown to Date Calculator. Free, instant, runs in your browser.