Date & Time
Date Difference Calculator
Calculate the exact difference between two dates in days, weeks, hours, minutes, seconds, and a years/months/days breakdown.
Pick two dates
Difference
572 days
That is 1 years, 6 months, and 26 days.
Weeks
81
Hours
13,728
Minutes
823,680
Seconds
49,420,800
Weekdays (Mon-Fri)
408
Weekend days
164
Frequently Asked Questions about the Date Difference Calculator
How is the difference between two dates calculated?
The calculator finds the absolute number of milliseconds between the two dates, divides by the length of one day, and rounds to the nearest whole day. Weeks are floored from that day count. Hours, minutes, and seconds are derived from total days (not raw milliseconds), so they stay consistent with the day figure. Years and months use calendar arithmetic with month-length borrowing so partial months are handled correctly.
Does this calculator handle leap years?
Yes. The calculator works on actual calendar dates, so any Feb. 29 that falls within your range is counted as a real day. For example, 01/01/2024 to 01/01/2025 returns 366 days because 2024 is a leap year.
Why are weekdays and weekend days both shown?
Work scheduling, billing periods, and project timelines often require the split between Mon-Fri days and Sat-Sun days. The calculator scans each day in the range (using an exclusive end date) so the two counts always add up to total days exactly.
Does daylight saving time affect the day count?
No. The calculator parses dates as calendar dates and rounds to whole days. The 23-hour spring-forward day and the 25-hour fall-back day each count as one day, so DST transitions never distort the result.
Why are years, months, and days shown separately from total days?
Total days is the precise, unambiguous count. The years-months-days breakdown (for example, 1 year, 3 months, 5 days) is how people naturally describe long spans in contracts, anniversary countdowns, or age calculations. Both views are shown because each is useful in different contexts.