Date Calculator
Calculate days between dates, add or subtract days from a date
Date Calculation
Choose your calculation type and enter the dates
Result
Your date calculation result
Enter dates and click calculate to see your result
About Date Calculations
Calculation Methods
- • Days Between: Calculates the exact number of days between two dates
- • Add Days: Adds a specified number of days to a given date
- • Subtract Days: Subtracts a specified number of days from a given date
Use Cases
- • Calculate project timelines and deadlines
- • Determine age in days, weeks, months, or years
- • Plan events and countdown timers
- • Calculate interest periods and payment schedules
- • Track time between important dates
Frequently Asked Questions
How do I calculate the number of days between two dates?▾
Subtract the earlier date from the later date. Our calculator handles leap years and varying month lengths automatically, so you get an accurate day count.
Does the calculator count business days?▾
It can count both total days and business days (Monday–Friday), excluding weekends. This is useful for project deadlines and business planning.
How do I add days to a date?▾
Enter the starting date and the number of days to add. The calculator returns the resulting date, correctly accounting for month boundaries and leap years.
Are leap years handled correctly?▾
Yes. A leap year adds one day (February 29) every four years, with exceptions at century marks. The calculator applies these rules automatically.