Dates, measured.

DateLab

Free calculators that turn two dates into the days, weeks, and calendar breakdown between them, for counting down or counting since.

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Date Difference Calculator
A free date difference calculator that measures the span between two dates two ways: as a running total of days and weeks, and as a calendar breakdown of years, months, and days. The calendar breakdown accounts for leap years and uneven month lengths, so the figure matches how people actually count age and anniversaries. Dates are treated as whole calendar days, so timezone and daylight-saving shifts never change the result. Everything is computed in your browser.

Guides for better estimates

Start with the calculator, then use these sourced guides to understand the assumptions behind it.

Why do two date calculators give different day counts?

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