Tiny Toolkit

Date Difference Calculator

Enter two dates to instantly see the exact gap between them in days, weeks, months, and years — as well as total hours and minutes. The tool calculates calendar months and years accurately, accounting for variable month lengths and leap years. Great for counting days until a deadline, event, or anniversary.

All processing happens in your browser. No data is sent to any server.

Frequently Asked Questions

How is the date difference calculated?
The tool calculates the exact millisecond difference between the two dates at midnight local time, then converts to days, weeks, months, and years.
Are months and years calculated as calendar months or fixed lengths?
Calendar months and years: the difference between 1 Jan and 1 Feb is always 1 month, regardless of how many days are in February.
Can I calculate days in the past?
Yes. The tool accepts any valid date (past, present, or future) and always returns the absolute (positive) difference.

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