Date Difference Calculator

Enter two dates and choose the units to display the difference in days, weeks, months, and years.

This Date Calculator helps you quickly find the difference between two dates in days, weeks, months, and years. Enter a start date and end date to instantly calculate how much time has passed — or how much time remains — between them. The tool supports inclusive and exclusive end-date options and displays results in multiple easy-to-read formats. It’s perfect for project planning, billing cycles, anniversaries, school timelines, or any situation where you need accurate time spans. Whether you want the number of days between two events or a full breakdown across months and years, this calculator provides reliable and instant results.

For business-only calculations, use the Business Days Calculator. To explore holiday impacts within your range, view upcoming U.S. holidays.