Date Calculator

A date calculator is a tool that helps you perform date arithmetic. You can add or subtract days, weeks, months, or years from any date, or calculate the exact difference between two dates. It's useful for project planning, tracking deadlines, calculating age, or finding out how many days until a specific event.

Select the "Add/Subtract" tab, enter your starting date, choose "+ Add" from the dropdown, enter the number of days (or years, months, weeks) you want to add, and click "Calculate". The result will show the new date.

Switch to the "Date Difference" tab, enter your start date and end date, then click "Calculate Difference". The tool will show you the difference in years, months, days, as well as total days, weeks, hours, and business days.

Business days (also called working days or weekdays) are Monday through Friday, excluding weekends (Saturday and Sunday). Our calculator counts only these days, which is useful for project timelines, delivery estimates, and deadline calculations in professional settings.

Yes! Use the "Date Difference" tab. Set today's date as the "From" date and your target date as the "To" date. The calculator will show you exactly how many days, weeks, and months until that date.

Our date calculator is highly accurate and handles leap years, varying month lengths (28-31 days), and daylight saving time correctly. It uses the industry-standard date-fns library for all calculations.

• Calculate project deadlines and milestones
• Find out how many days until a vacation, birthday, or event
• Calculate age in days, weeks, or months
• Determine payment due dates
• Plan schedules and timelines
• Calculate contract or subscription end dates
• Track pregnancy weeks or baby's age