Adjust the inputs below. Results update as you type.
Calendar math uses the Gregorian calendar. “Add months” snaps to valid calendar days (e.g. Jan 31 + 1 month may land on Feb 28/29). For legal contracts, confirm business-day rules separately.
Exclusive (difference in days)
125 days
≈ 17 weeks and 6 days
Inclusive (both endpoints counted)
126 days
≈ 18 weeks and 0 days
Uses your local calendar midnights. "Exclusive" is the gap between dates; "inclusive" counts both the start and end day.