Calculate the exact number of days, weeks, and months between two dates.
Working out timelines, notice periods, deadlines, and how long until an event.
Pick a start date
Choose the first date using the date picker.
Pick an end date
Choose the second date. It must be on or after the start date.
Read the duration
See the breakdown in years, months and days, plus total days and weeks. Optionally include the end day.
Counting the exact time between two dates by hand is tricky because months and years have different lengths and leap years get in the way. This tool gives you the precise number of days, weeks, and months instantly.
Project timelines
Measure how long a project ran or how many days remain until a deadline.
Notice & contracts
Count notice periods, trial periods, or contract lengths exactly.
Countdowns
Work out how many days until a wedding, holiday, or launch.
Yes. The day count uses real calendar dates, so February 29 is handled automatically.
It adds one day so both the start and end dates are counted — useful for inclusive ranges.
The years/months/days breakdown is exact; the standalone “months” total is an approximation based on average month length.