Date Difference Calculator
Calculate the exact difference between two dates
Find out exactly how much time separates two dates. Get results in multiple granularities — from years and months down to seconds — with optional business day counting.
Key Features
- ✓Calculate difference in years, months, weeks, and days
- ✓Show total hours, minutes, and seconds
- ✓Optional business days only calculation
- ✓Support for date and time inputs
- ✓Swap start and end dates easily
- ✓Add or subtract days from a date
How to Date Difference Calculator
- 1
Enter the start date
Pick or type the first date, optionally including time.
- 2
Enter the end date
Pick or type the second date to compare against.
- 3
View the breakdown
See the difference in years, months, weeks, days, hours, minutes, and seconds.
- 4
Toggle business days
Enable the business days option to exclude weekends from the count.
Common Use Cases
- •Calculating project duration between milestones
- •Figuring out age or time since an event
- •Planning deadlines and delivery schedules
- •Counting business days for contracts
Frequently Asked Questions
Does it account for leap years?▼
Yes. The calculator correctly handles leap years and varying month lengths.
Can I calculate business days?▼
Yes — toggle the business days option to exclude Saturdays and Sundays from the count.
Can I include time, not just dates?▼
Yes. You can specify exact times (hours, minutes, seconds) for precise duration calculations.