Date Difference Calculator
Count the days, weeks, months and years between two dates.
Free date difference calculator. Enter two dates to see the gap between them in days, weeks, months and years. Perfect for deadlines, anniversaries and project planning. Works in your browser.
How to use the Date Difference Calculator
- 01Choose a start date and an end date.
- 02The difference appears in days, weeks, months and years.
- 03Order doesn't matter — the tool always shows a positive span.
Frequently asked questions
Does it matter which date I put first?
No. If the end date is earlier than the start date, the calculator swaps them so you always get a positive difference.
How are months and years counted?
Months count complete calendar months between the dates, and years are whole 12-month blocks. Days and weeks are exact.