Date Difference Calculator

Find the exact distance between two dates in days, weeks, months, and years.

Inputs

Start Year

1,9002,100

Start Month

112

Start Day

131

End Year

1,9002,100

End Month

112

End Day

131

Calculation Results

Difference in Days

162 days

Difference in Weeks

23.14 weeks

Difference in Months

5.32 months

Difference in Years

0.44 years

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Formula & Mathematical Explanation

\displaystyle \Delta T = |T_2 - T_1|

Calculates the absolute millisecond difference between two date instances and converts it into standard time units, where a month is approximated as 30.4375 days and a year as 365.25 days.