Date & Time Tools

• Age CalculatorCalculate age in years, months, and days from a date of birth, plus total months, weeks, and days lived. Free and runs in your browser.
• Date Difference CalculatorFind the difference between two dates in years, months, days, weeks, and total days. Order does not matter and it runs in your browser.
• Days Between DatesCount the number of days between two dates, including business days and weekend days, with an option to include the end date.
• Date Calculator (Add or Subtract)Add or subtract years, months, weeks, and days from a date to find a new date and its day of the week.
• Age in Days CalculatorFind your age in days, weeks, hours, and minutes from a date of birth. Exact calendar-day counting, right in your browser.
• Day of the Week CalculatorFind the day of the week for any date, plus the day of the year, weekend status, and leap-year status.
• Days Until Date CalculatorCount the days until a future date, with the gap also shown in years, months, and days. Free and browser-based.
• Days Since Date CalculatorCount the days since a past date, with the elapsed time also shown in years, months, and days.
• Hours Between Two TimesCalculate the hours and minutes between two clock times, including overnight spans, in your browser.
• Time Duration CalculatorCalculate the duration between two times in hours, minutes, and seconds, including overnight spans.
• Military Time ConverterConvert military (24-hour) time to standard 12-hour time and back, with correct handling of midnight and noon.