Free Online Calculator
Find the number of days, weeks, months and years between two dates, and see how many of them are weekdays.
Choose a start date and an end date to see the difference.
A short guide to how the dates are counted, with worked examples.
Enter a start date and an end date to see the time between them in three ways: as years, months and days; as a total number of days; and as weeks plus leftover days. It also counts how many of those days fall on weekdays (Monday to Friday) and how many fall on weekends.
The calculator counts whole years first, then whole months, and then the days that remain. Because months have different lengths, this is a calendar count and not a fixed 30-day month.
When the start date is a day that the target month does not have, such as the 31st, the calculator uses the last day of that month instead.
Example: 31 January 2024 to 1 March 2024
31 January to 29 February is 1 month (29 February is the last day of February in a leap year).
29 February to 1 March is 1 day.
Result: 1 month and 1 day, which is 30 days in total.
By default the end date is not counted, so 1 January to 2 January is 1 day. This matches how most people measure the time that passes between two moments.
Tick "Include the end date" when both the first and the last day count. A conference that runs from 10 to 12 March covers 3 days including both ends, even though only 2 days pass between its start and its end.
Example: 1 January 2024 to 31 December 2024
Without the end date: 365 days, or 11 months and 30 days.
With the end date: 366 days, which is exactly 1 year in a leap year.
The weekday count includes Monday to Friday, starting from the start date. It does not know about public holidays, company shutdowns or regional weekends (some countries use Friday and Saturday), so treat it as an estimate of working days and subtract any holidays yourself.
Example: 15 March 2024 (a Friday) to 20 June 2024
97 days in total, which is 13 weeks and 6 days.
69 weekdays and 28 weekend days.
A leap year has 366 days because 29 February is added. Years divisible by 4 are leap years, except century years that are not divisible by 400, so 2000 and 2024 were leap years but 1900 and 2100 are not.
The calculator handles this automatically. From 1 January 2000 to 1 January 2024 is exactly 24 years, or 8,766 days, because six leap days fall in that period.
Dates are treated as calendar dates, without a time of day or a time zone. The calculator accepts years from 1000 to 9999.
Enter both dates and read the Total days figure. By default the end date is not counted. Tick "Include the end date" to count both the first and the last day.
No. If the start date is after the end date, the calculator swaps them and tells you it did so.
Whole calendar months are counted from the start date, and any remaining days are shown separately. If the start day does not exist in a month, the last day of that month is used.
No. It counts Monday to Friday only, so public holidays and other days off are not removed. Subtract them yourself for an exact count of working days.
Yes. Leap days are included automatically, so a span that contains 29 February counts it.
No. The calculation runs in your browser and your dates are not sent to our server or stored.
Results are calculated from calendar dates only. For legal, contractual or payroll deadlines, confirm the exact counting rules that apply to you.