Date Difference Calculator
Find the difference between any two dates.
Select Dates
How It Works
This calculator finds the exact difference between two dates using calendar-aware arithmetic. It accounts for varying month lengths (28–31 days) and leap years to give a precise breakdown in years, months, and days. The total-days count uses the actual elapsed time, so it won't simply be years × 365 — leap years add an extra day.
When the end date is in the future, a live countdown updates every second showing remaining days, hours, minutes, and seconds. Quick presets let you instantly count down to common dates like Christmas, New Year's, or the next Friday.