Date Difference Calculator
Calculate the time between two dates (years, months, days, hours, minutes, seconds).
Start Date
End Date
ℹ️ About date calculations
Use this Date Difference Calculator to find the exact difference between two dates and times. The calculator returns a human-friendly breakdown (years, months, days, hours, minutes, seconds) plus total values (days, weeks, hours, minutes, seconds) and useful insights such as business days, weekend days, percentage of a year, and milestone dates (25% / 50% / 75%).
Tips: select the start and end dates and click Calculate. Use the timeline to visualise progress between dates. For time-zone sensitive calculations, note that this tool works with server local time; convert externally if you need strict timezone-aware differences.
- Inclusive vs exclusive: This tool measures the exact elapsed time between the two moments. If you need to include both start and end dates as whole days, add 1 day to the total.
- Leap years: Leap days (Feb 29) are counted automatically when they fall between the dates.
- Time zones & DST: Calculations use server local time. For timezone-aware differences or daylight saving adjustments, convert your dates to the same timezone before using the calculator.
- Business days: The business days count excludes weekends. It does not currently exclude public holidays—adjust manually if needed.
- Use cases: planning projects, measuring age precisely, countdowns, and SLA calculations.
Start Time:
End Time:
