Time & Date Calculators

Ages, durations & countdowns

Exact age in years, months and days from any birth date — plus total days and next birthday countdown.

Add or subtract days, weeks, months or years from a date to find deadlines and future dates.

Count days between two dates, with inclusive totals, weekday counts and weekend counts.

Time between a start and end clock time, with optional break deduction for timesheets.

ISO-8601 week number for any date, plus that week's Monday-to-Sunday range.

Count working days between two dates or find the date N business days away, skipping weekends.

About time & date calculations

Time and date calculators for ages, date differences, business days, work hours, week numbers, time zones and Unix timestamps.