Add or subtract days from a date
What date is 90 days from today? Add or subtract days, weeks, months or years from any date.
Age calculator
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Days between dates
Days
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Weeks
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Business days
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Months & days
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Add or subtract
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Runs entirely in your browser. Nothing you enter is sent to a server.
Calculators
Adding months
Adding months keeps the same day number when it exists. When it doesn’t — say, one month after 31 January — the date moves to the last day of the shorter month (28 or 29 February).
Frequently asked questions
How do I calculate my exact age?
Enter your date of birth; the calculator shows years, months and days, plus your age in total months, weeks and days.
Does it handle leap years?
Yes. Dates are calculated with the real calendar, including 29 February.
Are public holidays excluded from business days?
No — only Saturdays and Sundays are excluded, because holidays differ by province and employer.