Calculate the number of days, weeks, months, and years between any two dates.
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Enter two dates to instantly calculate the exact number of days, weeks, months, and years between them. You can also add or subtract days, weeks, or months from any date to find a future or past date — useful for deadlines, project planning, lease calculations, and legal notices.
The difference between two dates must account for varying month lengths and leap years. Simple subtraction does not work — you need the actual calendar. Our calculator handles this correctly for any date range, including leap year boundaries and month-end edge cases.
Many contracts, legal notices, and project timelines specify business days rather than calendar days. A 30 business day deadline is very different from a 30 calendar day deadline as the former excludes weekends and public holidays, adding approximately 12 to 14 extra days to the actual calendar span. When calculating business day deadlines, always confirm which public holidays apply in the relevant jurisdiction as these vary significantly between countries and even between regions within the same country.
Interest calculations, loan agreements, and financial contracts often require exact day counts between dates. Even a one-day difference can affect accrued interest calculations on large loan balances. Legal notice periods such as 30 days or 60 days typically run from the date of service and must be calculated precisely to determine the deadline date. Our calculator gives you the exact number of days, weeks, months, and years between any two dates, with results you can use confidently in formal documents and agreements.
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