About

Calculate the exact difference between two dates, two times, or two date-time values. The tool shows a detailed breakdown in years, months, weeks, days, hours, minutes, seconds, and milliseconds — all processed locally in your browser.

How to Use

1. Choose a mode: Date, Time, or Date & Time
2. Enter a start value and an end value using the inputs provided
3. Click "Calculate Difference" to see the result
4. Expand the detailed breakdown accordion to view totals in every unit
5. Click "Reset" to clear the inputs and start over

Frequently Asked Questions