Date Difference Calculator
Days between two dates in years/months/days plus totals.
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About this calculator
Project deadlines, notice periods, interest accrual and warranty windows all live on this calculation. The weekday estimate helps sanity-check business-day counts before precise holiday adjustments.
Formula
Calendar subtraction with month/day borrowing; total days via UTC-normalised millisecond difference.
Frequently Asked Questions
Inclusive or exclusive counting?
This shows elapsed time (exclusive of start). For inclusive booking-style counts add 1 to total days.
Timezone handling?
Both dates parse at midnight local time, avoiding off-by-one issues common when mixing timezones.