Calculate Days, Weeks, Months & Years Between Two Dates
Days = End Date - Start Date
📖 Date Difference Calculator - Days Between Two Dates
A date difference calculator is an essential tool for anyone who needs to know the exact time span between two dates. Whether you're calculating your age, planning a project, tracking a pregnancy due date, or counting down to an event, this tool provides accurate results in days, weeks, months, and years. It also includes detailed breakdowns like weekdays (Monday-Friday) and weekends (Saturday-Sunday), along with hours, minutes, and seconds.
📐 How to Calculate Date Difference
Days = End Date - Start Date
Month lengths: Different months have 28-31 days
Leap years: February has 29 days in leap years
Year boundaries: Crossing from one year to another
📊 Common Use Cases
Use Case
Example
Age Calculation
Birth date → Today
Employment Tenure
Joining date → Today
Project Planning
Start date → End date
Event Countdown
Today → Event date
❓ Frequently Asked Questions
How to calculate days between two dates? ▼
Subtract the start date from the end date. This calculator does it automatically, accounting for month lengths, leap years, and year boundaries.
Does the calculator include both start and end dates? ▼
It shows the difference. From Monday to Wednesday is 2 days difference. Add 1 to include both dates.
What is a leap year? ▼
A leap year has 366 days with February 29. The calculator automatically includes leap day for accurate results.
How to calculate my exact age? ▼
Enter your birth date as start and today as end. The calculator shows exact age in years, months, and days.
Can I calculate working days? ▼
Yes! The calculator shows weekdays (Monday-Friday) separately for business day estimation.