Date Difference Calculator
Calculate time between two dates in multiple formats
Select dates to see the difference here
Live Countdown Timer
Countdown Timer
How to Use This Date Calculator
Step-by-Step Guide
Select Start & End Dates
Choose your dates using the date pickers or quick preset buttons.
Add Time (Optional)
Include specific times for more precise calculations.
Calculate
Click "Calculate Difference" to see results in multiple formats.
Use Countdown
Set a future date for a live countdown timer.
Common Use Cases
Age Calculation
Calculate exact age in years, months, and days from birth date.
Project Planning
Calculate days between project start and end dates.
Vacation Countdown
Create countdowns for upcoming vacations or events.
Anniversary Tracking
Track how long since important dates like weddings.
Frequently Asked Questions
Our date calculator is extremely accurate and accounts for:
- Leap years (366 days in leap years, 365 in common years)
- Month length variations (28, 30, or 31 days)
- Time zone adjustments (using your browser's local time)
- Daylight saving time where applicable
Currently, our calculator counts all calendar days including weekends. For business day calculations:
Tip:
To estimate business days, multiply the total weeks by 5 (weekdays). For example, 4 weeks = approximately 20 business days.
We're working on adding a business days calculator feature in a future update.
The countdown timer updates in real-time and shows:
Live Updates
Updates every second automatically
Persistent
Continues even if you switch browser tabs
Customizable
Add your own title and target date
Controls
Pause, reset, and customize as needed
Yes! Our calculator works with any dates, past or future. You can:
- Calculate elapsed time between past dates
- Calculate future time until upcoming events
- Mix past and future - any combination works
- No date range limits - works with any year