How it works
The calculator converts both dates to calendar days and subtracts them, so leap years and month lengths are handled automatically. The "years, months, days" figure steps through whole months the way people usually state ages and durations. The weekday count includes the start date and excludes the end date.
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Frequently asked questions
Is the end date included?
No. The result is the number of days you would need to add to the start date to reach the end date. Add 1 if you want to count both dates.
Does it handle leap years?
Yes. February 29 is counted in leap years such as 2024 and 2028.
Can the end date be before the start date?
Yes. The tool shows the absolute gap.