Date Duration Calculator
The Date Duration Calculator counts the days, weeks, months, and years between any two dates, including business-day counts - ideal for deadlines, ages, and planning.
Exactly how far apart?
Pick a start and end date and the tool returns the gap in multiple units: total days, full weeks, and a breakdown in years, months, and days. It correctly handles leap years and months of different lengths, so the count is accurate rather than an approximation.
Business days too
It can also count only working days (excluding weekends), which is what you need for project timelines, notice periods, and delivery estimates. Use it to work out how long until a deadline, how many days you have been somewhere, or the span of an event. To add or subtract time from a date instead, use Date Add / Subtract.
Frequently Asked Questions
Does it count leap years correctly?
Yes. It uses real calendar dates, so leap years and varying month lengths are handled accurately.
Can it count only business days?
Yes. It offers a working-day count that excludes weekends, useful for project and notice-period planning.
Does the count include both the start and end dates?
It reports the duration between the dates; you can see the total days and the year-month-day breakdown.
What is it useful for?
Counting days to a deadline, someone's exact age, tenure, event length, or time between milestones.
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