★ Free Calculator
Date Difference Calculator
Count the days, weeks and months between two dates, or add days to a date.
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About this toolDate Difference Calculator counts the time between two dates for deadlines, notice periods and countdowns, and can add or subtract days from a date.
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Date Difference Calculator counts the time between two dates for deadlines, notice periods and countdowns, and can add or subtract days from a date.
More about Date Difference CalculatorHow to use, good to know & FAQ
How to use Date Difference Calculator
- Pick a start date and an end date.
- Choose whether to include the end date.
- Read the difference in days, weeks, months and working days.
Frequently asked questions
How are working days counted?
Monday to Friday are counted. Public holidays are not removed because they differ by country.
Does it include the end date?
You can choose whether to include the end date in the count.
Can it count business days?
It counts calendar days; subtract weekends separately for working days.
When to use Date Difference Calculator
- Count days until a deadline or event
- Calculate notice periods and durations
- Work out project timelines
- Find a date a number of days from today
📘 Read the guide: How to Calculate Percentages: Simple Formulas With Examples