Date Calculator - Days Between Dates
Calculate the difference between dates or add/subtract time from any date. Our Date Calculator helps with project planning, event countdown, and date math.
Features
- Date difference - Days, weeks, months, years between dates
- Add/Subtract - Add or subtract time from a date
- Multiple units - Results in days, weeks, months, years
- Today button - Quick set to current date
- Breakdown view - Years + months + days format
Date Difference Mode
Enter a start and end date to calculate:
- Total days between dates
- Weeks between dates
- Months (approximate)
- Years (approximate)
- Hours and minutes
Add/Subtract Mode
Start with any date and add or subtract:
- Years
- Months
- Days
How to Use
Calculate Difference
- Select the "Date Difference" tab
- Enter or select your start date
- Enter or select your end date
- View the results instantly
Add or Subtract Time
- Select the "Add/Subtract" tab
- Enter your starting date
- Choose "Add" or "Subtract"
- Enter years, months, and days
- See the resulting date
FAQs
How are months calculated?
Month calculations use calendar months. Adding 1 month to Jan 31 gives Feb 28/29.
Does it account for leap years?
Yes, the calculator handles leap years correctly.
Can I use past dates?
Yes, both past and future dates work.
Use Cases
- Project planning - Calculate project duration
- Event countdown - Days until an event
- Age calculation - Days since birth
- Contract dates - Calculate end dates
- Vacation planning - Days of travel