Day Counter - Count Days Between Dates
Count the exact number of days between any two dates. Optionally exclude weekends and holidays to calculate working days and business day deadlines.
Formula
Days = End Date - Start Date (+ 1 if inclusive)
Calculate the difference in days between two dates. Add 1 to include both start and end dates. Automatically accounts for varying month lengths and leap years.
Worked Examples
Example 1: Vacation Planning
Problem:Calculate days for a vacation from July 15 to August 3 (inclusive).
Solution:Start: July 15\nEnd: August 3 (inclusive)\n\nJuly days: 17 (Jul 15-31)\nAugust days: 3 (Aug 1-3)\n\nTotal: 17 + 3 = 20 days\n\nWeekdays (work days missed): ~14\nWeekend days: ~6
Result:20 days total (14 weekdays, 6 weekend days)
Example 2: Project Deadline
Problem:A project starts March 1 and is due June 30. How many working days are available?
Solution:March 1 to June 30 = 122 calendar days\n\nComplete weeks: 17 (119 days)\nRemaining days: 3\n\nWeekdays: ~87\nWeekend days: ~35\n\nWork hours (8hr/day):\n87 × 8 = 696 hours\n\nMinus holidays: ~5-10 days
Result:~87 weekdays (696 work hours)
Example 3: Age in Days
Problem:Calculate days lived for someone born January 1, 2000 (as of December 31, 2024).
Solution:Birth: January 1, 2000\nToday: December 31, 2024\n\nYears: 25 (not complete until Jan 1)\nLeap years in range: 2000, 2004, 2008, 2012, 2016, 2020, 2024 = 7\n\nDays: 24 × 365 + 7 = 9,132 days\n(Excluding end date for age)
Result:9,131 days (24 years, 366 days)
Frequently Asked Questions
How do I count the days between two dates?
Enter the start and end dates. The calculator instantly shows total days between them. Toggle 'Include end date' to count both the start and end dates (useful for rental periods, event durations) or exclude the end date (useful for age calculations).
What's the difference between calendar days and business days?
Calendar days include all days (weekdays and weekends). Business days (weekdays) only count Monday through Friday. Day Counter - Count Days Between Dates shows both. For exact business day calculations, you'd also need to exclude holidays specific to your country/region.
Should I include the end date in my count?
It depends on your purpose. Include end date for: hotel nights, rental periods, vacation days, countdown to events. Exclude end date for: age calculations, periods ending before a date. Example: Jan 1 to Jan 3 inclusive = 3 days, exclusive = 2 days.
How accurate is the month and year count?
Month and year calculations are based on calendar boundaries, not fixed day counts. 'One month' from January 15 to February 15 counts as one month regardless of whether January has 31 days. For precise billing, use day or hour counts.