Utilities
Days Between
Dates
Pick any two dates and instantly see the difference in days, weeks, months, years, and business days.
Select Dates
Days Apart
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Enter two dates to calculate
Weeks
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Months (approx.)
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Years (approx.)
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Business Days
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About this calculator
The difference between two calendar dates is calculated by converting both dates to a sequential day count (using a system like the Julian Day Number) and subtracting. This method correctly handles varying month lengths, leap years, and year boundaries without error-prone manual arithmetic.
Common uses include calculating project durations, time remaining until a deadline, age verification at a specific date, contract period lengths, and looking back at how long ago an event occurred. The result can be expressed in days, weeks, or broken down into years, months, and days.