Tip: All calculations run locally in your browser.
Converter Result
Converter Result
Select a mode and fill the form. Click Calculate to see results here.
Days:
Weeks:
Decimal Weeks:
Weeks + Days:
Target Date:
Calculation Principles & Formulas
The Weeks Calculator determines the number of full weeks and remaining days between two dates, or calculates a future/past date by adding/subtracting weeks. All calculations are based on the Gregorian calendar.
[Formulas]
1. Date Difference:
Total Days = (End Date - Start Date in ms) / (1000 * 60 * 60 * 24)
Full Weeks = Math.floor(Total Days / 7)
Remaining Days = Total Days % 7
Decimal Weeks = Total Days / 7
2. Date Projection:
Target Date = Base Date + (Weeks * 7 * 24 * 60 * 60 * 1000) + (Days * 24 * 60 * 60 * 1000)
Note: Calculations assume standard 24-hour days and do not account for leap seconds.
