Days Calculator
Calculate the number of days between two dates, or add/subtract days from a date. Results include breakdown by weeks, months, and years. Useful for project deadlines, countdowns, and age calculation.
Today's Date:
All calculations include the start date and exclude the end date (business convention).
All calculations include the start date and exclude the end date (business convention).
Why You Need Day Calculations
Dates look simple until you need to know how many working days are left before a deadline, how many days a subscription covers, or whether a project falls inside a specific window. This calculator counts the exact difference between two dates and can also add or subtract days from a starting date.
Common Uses
- Planning a trip or visa stay within a day limit
- Checking billing cycles, trial periods, or warranty coverage
- Finding a deadline when you only know the starting date and duration
Does the calculation include the start date?
The difference mode counts full days between the two dates. For event planning, always confirm whether the platform includes or excludes the start day.