Date Difference Calculator
A powerful and accurate tool to compute the exact duration between two dates in years, months, weeks, days, and more.
Select valid start and end dates to see the duration.
The Calclytix Date Difference Calculator is a powerful and accurate tool designed to compute the exact duration between two dates across multiple time units—including years, months, weeks, days, hours, minutes, seconds, and milliseconds. Unlike basic calculators that only count days, the Calclytix version includes advanced capabilities such as business day calculations, weekend exclusion, timezone-aware duration, holiday list integration, and precise partial-day calculations when times are included.
This tool is ideal for project managers, HR professionals, students, researchers, accountants, travelers, and everyday users. It helps calculate working days between project phases, employee tenure, assignment duration, interest accumulation periods, countdowns to events, and comparative date pairs for multi-phase tasks.