Date Calculator
Add or subtract days, weeks, months or years from any date and get the exact resulting date and weekday — free, fast and private.
Pick a date and click Calculate Date.
How to use Date Calculator
- Pick your starting date.
- Choose add or subtract and enter the amount.
- Select days, weeks, months or years.
- Click Calculate Date to see the result and weekday.
Note: this tool runs in your browser. Nothing is uploaded.
Frequently Asked Questions
Is the Date Calculator free?
Yes, it is 100% free with no sign-up.
Does it handle months correctly?
Yes. Adding months uses real calendar math, so adding 1 month to 31 January gives 28 February in a non-leap year.
Does it account for leap years?
Yes. Leap years are handled by the browser's calendar, including 29 February.
Can I use it to plan deadlines?
Yes. It is ideal for deadlines, due dates, anniversaries and project planning.