Enter a start date and specify years, months, weeks, and days to add or subtract — the Date Calculator returns your resulting date along with the total number of days shifted. Choose whether to add or subtract from your chosen date and get the exact future or past date in seconds.
Resulting Date
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Total Days Shifted
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Day of Week
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Days from Today
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Select your start date, choose 'Add (+)' as the operation, then enter the number of years, months, weeks, and/or days you want to add. The calculator will display the resulting future date and the total number of days shifted.
Select your start date, choose 'Subtract (−)' as the operation, and enter the years, months, weeks, or days you want to go back. The calculator instantly returns the past date and the total days subtracted.
Yes. You can enter any combination of years, months, weeks, and days simultaneously. The calculator handles all values together to produce a single resulting date.
Yes. The calculation uses JavaScript's native Date object, which automatically accounts for leap years (February 29) and varying month lengths, so your results are always accurate.
One week equals exactly 7 days. Using the weeks field is simply a convenience — entering 2 weeks is the same as entering 14 days. You can use whichever unit is most natural for your use case.
The calculator supports adding or subtracting up to 999 years, 999 months, 9,999 weeks, and 9,999 days, covering virtually any practical date calculation need.
'Days from Today' shows the difference between the resulting date and today's date. A positive number means the result is in the future; a negative number means it is in the past.
Absolutely. Enter your project start date or an event date, then add the required number of days or weeks to find the exact deadline. This is useful for legal deadlines, project planning, pregnancy due dates, and more.