Days Since Calculator
Find how many days have passed since a date. See elapsed weeks and days, compare with today or another date, and include leap days automatically.
Your date result will appear here.
How to use this calculator
- Enter the date you want to count from in Past date.
- Check From date, which defaults to your device’s current date. Change it to compare against another day, then select Calculate.
How it works
Counts calendar days between the entered date and the reference From date, including leap days. The earlier endpoint is included and the later endpoint excluded. The result includes complete weeks and remaining days; its 24-hour equivalent is a conversion of calendar days, not a measurement across daylight-saving changes.
Example
Past date: February 28, 2024. From date: March 1, 2024.
2 days have passed, including February 29. Using the same date in both fields gives 0 days.
Common questions
Can I enter a future date?
Yes. If Past date is later than From date, the result says how many days from now instead of displaying a negative number. Here, “now” refers to the selected From date.
Which time zone determines today?
The default From date comes from your device’s local calendar date when the calculator loads or resets. People in different time zones may have different dates near midnight. Check the field if you leave the page open overnight.
Are weekends and holidays included?
Yes. This is a calendar-day count, so weekends, holidays and leap days all count.