Date Difference Calculator
Pick a start and end date and instantly see the time between them — as total days, weeks and months, and as an exact year-month-day breakdown. Handy for project timelines, contract periods, event countdowns and official applications.
Frequently asked questions
How is the number of days between two dates calculated?
The calendar days between the two dates are counted. This tool automatically accounts for leap years and varying month lengths.
Is the end date included?
No; the difference is the number of nights from the start date to the end date. If you want to include the end date itself, add 1 day to the result.
Why is the month difference approximate?
Months vary between 28 and 31 days, so the total month count is derived from the calendar breakdown; the year-month-day breakdown itself is always exact.