Days Between Dates
—Choose two dates.
Date math.
Without counting squares.
Find days between dates, count weekdays, add or subtract time, calculate age and check what day of the week a date lands on.
● Calculated in your browserAdd or Subtract Time
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Age Calculator
—Choose a birth date.
Day of the Week
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Business-day count: weekdays are Monday through Friday. This simple calculator does not automatically remove statutory/public holidays because those vary by country and jurisdiction.
Useful date calculations
Use this for deadlines, project schedules, vacations, contract periods, birthdays, anniversaries or the classic “how many days until…” question.
Months need calendar math
Adding one month is not the same as adding 30 days. This tool uses calendar months and years for those operations, while days and weeks use exact day counts.