Result
Weeks Between Dates: Complete Weeks and Extra Days
Calculate complete weeks and remaining days between two dates.
Measure the calendar-day gap between two dates, then express it as complete seven-day weeks and remaining days.
Formula: Days = end calendar date − start calendar date. Complete weeks = floor(days ÷ 7); extra days = days modulo 7.
1 January to 16 January has a 15-day gap: 2 complete weeks and 1 extra day.
The start date is not counted as an additional day. The end date must be on or after the start. This is not an inclusive attendance or business-day count.
Method and examples
Decide whether you need an inclusive count
A gap from Monday to the following Monday is seven days, or one week. A list that includes both Mondays contains eight calendar dates. This tool measures the gap, so it does not add one for the starting date. For attendance or eligibility rules, confirm which convention the rule requires.
Calendar days differ from exact elapsed hours
The calculation compares calendar dates without hours or time zones. Crossing a daylight-saving change does not add or remove a calendar day here. It is therefore suitable for date intervals, but it cannot tell you the exact number of hours between two local timestamps.
Leap days are included automatically
A gap from 28 February 2024 to 1 March 2024 is two days because 2024 includes 29 February. The same dates in 2025 have a one-day gap. Month lengths and leap days are part of the date arithmetic; a month is not assumed to be four weeks.
A calendar week is not a working week
Two complete weeks mean 14 calendar days. Weekends and holidays are included, and the result is not an ISO week number. Use a business-day tool for schedules that exclude weekends. Do not use this count alone to determine legal deadlines, benefits or medical dating rules.
Maintained by: Muhammad Bhutto · 2026-10-17 · Methodology · Report an error