Date Difference Calculator

What is it?

The days between dates calculator precisely determines the number of days, weeks or months separating two dates, accounting for leap years.

Why use it?

Useful for calculating delivery deadlines, contract durations, trial periods, payment due dates or planning a project with a precise deadline.

How does it work?

Select a start date and end date. The tool automatically calculates the exact number of days between them, as well as the duration in weeks and months.

Usage tips

• Both the start date and end date are included in the calculation
• Leap years (366 days) are automatically accounted for
• For legal deadlines (14-day withdrawal right, 2-year warranty), count from the day after the start date
• Useful for calculating employee seniority or campaign duration