About the Date Calculator
Two date tools in one: count the exact number of days, weeks, months and business days between two dates, or add and subtract any combination of years, months, weeks and days from a date.
How to use it
- Choose “Between dates” or “Add / subtract”.
- Enter the dates or amounts.
- Results update instantly.
Formula & method
Business days = weekdays (Mon–Fri) between the dates; public holidays are not excludedFrequently asked questions
Does it include the end date?
By default, the count excludes the end date (like most calculators). Tick “Include end date” to add one day.
Results are estimates for general information only and are not financial, tax, legal or medical advice. Please confirm important decisions with a qualified professional.