Date Calculator
Add or subtract time from a date, or calculate the exact difference between two dates.
Two calculators in one
Add or subtract days, weeks, months or years from any date to find a future or past date, or enter two dates to see exactly how much time separates them.
Calculated instantly, on your device
All calculations happen directly in your browser as you type — there is no server call and no delay.
Frequently asked questions
Does adding months account for different month lengths?
Yes, the calculator correctly handles months with 28 to 31 days and leap years.
Can I calculate a date far in the past or future?
Yes, there is no practical limit on the date range supported.
How is the difference between two dates calculated?
We show both the exact years, months and days breakdown and the total number of days and weeks between the two dates.
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