Calculate the duration between two dates (days, weeks, months, years) or find a future/past date by adding/subtracting a period from a start date.
Date Calculator
Date Results
Days Between Dates
0 days
Weeks Between Dates
0 weeks
New Date
-
Enter dates to calculate the difference or add/subtract days.
Practical Examples and Use Cases
Personal Planning
Vacation Countdown
Enter today's date as Start Date and your vacation date as End Date to see how many days until your trip.
Pregnancy Due Date
Add 280 days to conception date (or 266 days to ovulation date) to estimate delivery date.
Financial Applications
Bill Payment Planning
Calculate days between invoice date and due date to plan payments (e.g., 30-day payment terms).
Interest Calculation
Determine exact days between transactions for precise interest calculations on loans or savings.
Project Management
Project Deadlines
Add business days to a start date to calculate project milestones (remember to account for weekends/holidays).
Warranty Expiration
Add warranty period (e.g., 365 days) to purchase date to find expiration date.
Academic Uses
Semester Planning
Calculate days between semester start and end dates to plan study schedules.
Research Deadlines
Subtract days from submission deadline to create intermediate milestone dates.
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