Free date calculator to count days, weeks, months, and years between any two dates. Track deadlines and plan events with precision.
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Planning an event? Tracking a deadline? Counting down to something special? Our days-between calculator tells you exactly how much time separates any two dates—in days, weeks, months, and years. Never miscalculate another deadline or anniversary again.
Calculating the difference between dates involves more than simple subtraction because months have different lengths, leap years add extra days, and time zones can affect the exact count. Our calculator handles all these complexities automatically. Date math is essential for project management, event planning, financial calculations (interest, due dates), and legal matters where exact day counts matter.
Basic Concept
Days Between = End Date - Start DateSee the difference in days, weeks, months, and years—all calculated accurately.
Automatically accounts for leap years, varying month lengths, and calendar quirks.
Works for past dates (how long ago) and future dates (how long until).
Calculate project durations, milestone timelines, and deadline countdowns.
Count days until departure, trip length, and time until return.
Calculate interest periods, payment due dates, and investment timeframes.
Track anniversaries, count days since important events, or plan celebrations.
By default, we calculate the difference between dates (end minus start), which doesn't include both endpoints. If you need to count both days inclusively (like counting vacation days), add 1 to the result.