To calculate the number of days between two dates, enter your start date and end date above and select "Calculate Difference". The calculator can also calculate total work period of employees, weeks, months, years, business days and date/time differences.
Calculate days between dates, add or subtract dates, calculate age, compare date and time, find weekdays and more. Free online date and time tools.
Absolute number of days from one date to another (e.g. 2026-01-01 to 2026-03-15).
Calendar-accurate breakdown, e.g. "3 years, 2 months, 14 days".
Full weeks plus any remaining days.
Counts Monday-Friday vs Saturday-Sunday, including both endpoints.
Add days, weeks, months or years (e.g. 45 days after today).
Go backwards by days, weeks, months or years.
Weekends excluded by default. Add public holidays as comma-separated YYYY-MM-DD dates.
Exact elapsed time between two moments, including hours, minutes and seconds.
Time worked or elapsed between a start and end time (e.g. 09:00 to 17:30). Overnight spans supported.
Enter a date of birth. "As of" defaults to today, but you can pick any date.
Find which weekday any date falls on, plus its day and week of the year.
Live countdown updating every second while this tab is open.
Use this free date calculator to find the number of calendar days between two dates. You can also compare dates in years, months and days, add or subtract time from a date, calculate business days, find your age, identify the day of the week, and measure time durations.
A date difference is the amount of time between two calendar dates. Depending on the calculation, the result can be expressed as days, weeks, months, years, or a combination of years, months and days.
Enter a start date and an end date in the Date Difference calculator and select whether the end date should be included. The calculator accounts for leap years and different month lengths when calculating calendar dates.
Here are some frequently asked questions about date calculator tools.
Enter the start and end dates, then select Calculate Difference. The calculator shows the calendar-day difference and related week and hour values.
Enter both dates into the Days Between calculator. You can choose whether to include the end date in the count.
Yes. Use Add to Date or Subtract from Date and choose days, weeks, months or years.
Yes. Calendar calculations correctly account for leap years, including February 29.
Calendar days include every day in the selected range. Business days exclude the selected weekend days and any holidays you enter.
Yes. The Date and Time Difference calculator measures elapsed days, hours, minutes and seconds and also provides a calendar-date breakdown when applicable.
Yes. Enter your date of birth and the date on which you want to calculate your age.
Yes. Use the Business Days calculator to calculate working days between two dates while excluding weekends and optional holidays.
Use the Countdown calculator to see the remaining days, hours, minutes and seconds until a future date and time.
Yes. The Add to Date and Subtract from Date calculators allow you to add or subtract days, weeks, months or years from a selected date.
