Calculate the number of days, weeks, or months between two dates, or add and subtract time periods from a start date. Useful for project deadlines, contract durations, age calculations, counting down to events, and working out notice periods or payment terms. Everything runs instantly in your browser.
Yes. Set the start date to today and the end date to your target date to see exactly how many days remain.
Yes. Enter a starting date and the number of days, weeks, or months to add or subtract, and the tool calculates the resulting date.
Yes. The calculation correctly handles leap years when counting days across February.
Check the tool options for a business-day-only mode. Standard date difference calculations include weekends.
No. All calculations happen in your browser. No data is sent anywhere.