Our free date calculator helps you find the exact duration between any two dates, add or subtract days/weeks/months/years from a date, and calculate business days excluding weekends and holidays. Perfect for project planning, deadline tracking, event countdown, and date-related calculations.
Date Calculation: Jan 1 to Dec 31, 2026
2026 is not a leap year. For project planning, typical holidays reduce business days by 10-15 more.
Choose the first date for your calculation using the day, month, and year dropdowns.
Choose the second date. The calculator finds the difference between these dates.
See days, weeks, months, years between dates plus business days excluding weekends.
Optionally add or subtract days from the start date to find a future or past date.
Date difference is calculated by finding the number of days between two dates, then converting to years, months, weeks as needed. Business days exclude Saturdays and Sundays from the count.
Days = End Date - Start Date
Business days typically exclude Saturdays and Sundays
Remember to account for holidays when calculating work days
Leap years have 366 days — February has 29 days
A standard year has 52 weeks and 1 day (or 2 days in leap years)
Weeks between dates can be calculated by dividing days by 7
For project planning, always add buffer days to your estimates
Our free date calculator helps you find the exact number of days between any two dates, add or subtract days from a date, calculate business days excluding weekends, and determine date differences in years, months, and weeks. Perfect for project planning, event countdowns, and deadline tracking.
Enter any two dates to instantly find the number of days between them. Our date difference calculator shows the result in multiple formats: total days, complete weeks, months, and years. It accurately handles leap years and varying month lengths for precise calculations.
Need to count only working days? Our business days calculator automatically excludes weekends (Saturday and Sunday) from your date range. Perfect for calculating project timelines, delivery estimates, and work schedules. See both total days and business days at a glance.
Calculate future or past dates by adding or subtracting days from any starting date. Add 30 days to find next month's date, subtract 90 days for quarterly planning, or calculate any date offset you need. Works with days, weeks, months, or years.
Get a complete breakdown of time between dates. See how many complete weeks, months, and years separate two dates, plus any remaining days. Useful for tracking project duration, anniversaries, and time-based milestones.
Data sourced from trusted institutions
All formulas verified against official standards.