Date Difference Calculator

Calculate the exact number of days, weeks, months, and years between any two dates.

Count both start and end dates (inclusive)
Select a start and end date above to calculate the difference.

Uses for Date Difference Calculation

Project deadlines, event countdowns, lease durations, loan terms, contract periods, anniversary tracking, age verification, and travel planning.

Frequently Asked Questions

You can choose inclusive or exclusive counting. Inclusive means both the start and end dates are counted (adds 1 day to the difference).
Yes. The calculator correctly accounts for leap years in all calculations.