Date Difference Calculator
Enter a start date and an end date to calculate exactly how much time separates them.
Date Difference Calculator
Calculates the number of days, weeks and approximate years between two dates.
This calculator subtracts one calendar date from another to give the exact number of days between them, then also expresses that gap in weeks and approximate years. It's useful for planning deadlines, calculating contract or lease durations, measuring elapsed time for reports, or simply satisfying curiosity about how far apart two dates really are.
Example
- With the default values shown above, this calculator returns: Days Between ≈ 253 days; Weeks Between ≈ 36.1 weeks; Approximate Years ≈ 0.69 years.
Frequently Asked Questions
Can the result be negative?
Yes — if the end date is before the start date, the day count will be negative, indicating the end date is earlier rather than later.
Why 365.25 days for a year?
365.25 accounts for the extra day added roughly every four years in a leap year, giving a more accurate average year length than a flat 365.
Sources
- Standard formula, publicly documented method