What Is the Date Calculator?
The Date Calculator shows you the number of days between two dates and lets you add or subtract days, weeks, months, or years from a date.
- Count days: Find the total number of days between two dates. Use it to calculate the difference between dates or see how many days are left until a particular date, such as New Year's Day. You can also exclude weekends and public holidays to count business days only.
- Add days: Find a future date by adding days, weeks, months, or years to a date. For example, "What date will it be six weeks from today?"
- Subtract days: Find an earlier date by subtracting days, weeks, months, or years from a date. For example, "What date was it two weeks ago?"
In summary, you can use this tool to plan trips, schedule deadlines and delivery dates, count the days remaining until a birthday, or even calculate your age. The calculator automatically handles differences in month lengths and leap years, and it can also account for weekends and public holidays when calculating business days.
How to Use the Date Calculator
Count days between two dates
- Click the Count Days tab.
- Set a Start date and End date, or click Today to use today's date.
- Click Calculate to see the duration between the dates in days, weeks, months, and years.
Use the calculation settings to include the end date, which adds one day to the result, or to exclude certain days, such as weekends and public holidays.
Add days to a date
- Click the Add Days tab.
- Select the Start date, or click Today.
- Set the Years, Months, Weeks, or Days to add to the date.
- Click Calculate New Date to see the new date.
Subtract days from a date
- Click the Subtract Days tab.
- Select the Start date, or click Today.
- Set the Years, Months, Weeks, or Days to subtract from the date.
- Click Calculate New Date to see the new date.
How to Calculate Business Days
The Date Calculator can also perform calculations using business days. You can count the business days between two dates or find a date a specified number of business days in the future or past.
Business day calculations can exclude weekends and public holidays, making it easy to answer questions such as "What date is 10 business days from today?" without counting the days manually on a calendar.
You can choose which days to exclude under Calculation settings on any of the three tabs. In most countries, Saturday and Sunday are weekend days, so you can exclude both from the calculation.
To exclude public holidays as well, select Exclude public holidays and choose your country from the list. If your working week does not run from Monday to Friday, simply select a different set of days to exclude.