How it works
The exact result follows calendar month lengths and leap years. Total days uses UTC date boundaries.
Input query strings and outputs
Use an input name in this page’s URL as ?name=value, and join additional inputs with &. Portable shared links may instead use the compact ?ac= state parameter.
Input query strings
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?startDate=Start dateDate · Required · Default: 2026-01-01
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?endDate=End dateDate · Required · Default: 2026-08-18
Outputs
4-
exactDifferenceExact differenceText · Primary output
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totalDaysTotal daysWhole number
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weeksAndDaysWeeks and daysText
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averageMonthsAverage monthsNumber