Sumbric · calendar math, explained

See the space between two dates.

Enter any two dates to get their absolute interval in days, weeks, and approximate months—even when the dates are entered in reverse.

Total days count whole calendar-day boundaries. Weeks = days ÷ 7. Approximate months = days ÷ 30.436875, the average Gregorian month (365.2425 ÷ 12).

The date difference calculator

Make the gap legible.
Pick two dates for an exact day count and useful calendar approximations.

The earlier date, if you are counting forward.

Dates can be reversed; the result stays absolute.

Your answer, in calendar time.
Your result will appear here.

No calendar guesswork.

Count exact day boundaries first, then translate them into weeks and an average Gregorian month.

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