Date Calculator

Calculate date differences and intervals

Calculate date differences and intervals

Date Range

Quick Ranges

What You Can Calculate

  • Date Difference: Calculate the exact time between two dates
  • Add/Subtract: Add or subtract days, months, or years from a date
  • Workdays: Find the number of business days between dates
  • Total Time: Calculate total days, hours, minutes, and seconds
  • Week Calculations: Determine week numbers and day of the week
  • Project Planning: Set project timelines and deadlines
  • Age Calculations: Calculate age or time since an event

How to Use

  • Select the Date Difference or Add/Subtract tab
  • Enter your start and end dates for difference calculation
  • Or select a base date and time period to add/subtract
  • Use the quick selection buttons for common date ranges
  • View the detailed breakdown of results
  • Check business days calculation for project planning
  • See additional information like day of week and week number

Project Management

  • Calculate project duration
  • Find deadline dates
  • Plan milestone dates
  • Track time remaining
  • Estimate delivery dates

Personal Planning

  • Plan vacation days
  • Calculate anniversaries
  • Track days until events
  • Schedule appointments
  • Plan celebrations

Business Applications

  • Calculate contract periods
  • Track employee tenure
  • Plan business cycles
  • Schedule recurring meetings
  • Manage payment deadlines

Date Calculation Tips

Business vs. Calendar Days

Business days exclude weekends (Saturday and Sunday). For project planning, using business days gives a more accurate timeline for work-related tasks.

Leap Years and Months

Our calculator automatically accounts for leap years and varying month lengths. This ensures accurate calculations even when spanning February in leap years.

Common Date Calculations

Frequently Asked

  • How many days until a specific date?
  • What date will it be in X days/months/years?
  • How many business days between two dates?
  • What was the date X days/months ago?
  • How many weeks between two dates?

Professional Uses

  • Contract term calculations
  • Project timeline planning
  • Employee service duration
  • Legal filing deadlines
  • Financial period calculations

About Date Calculator

Our date calculator is a versatile tool designed to handle all your date-related calculations. Whether you need to find the exact time between two dates or determine what date will occur after adding or subtracting a specific time period, this calculator provides accurate results instantly.

The calculator accounts for leap years, varying month lengths, and can even break down the time difference into business days and weekends. This makes it particularly useful for project planning, contract management, and any scenario where precise date calculations are needed.

With additional features like detailed breakdowns showing hours, minutes, and seconds between dates, as well as week numbers and day of year information, this calculator serves both everyday personal needs and professional requirements where date precision matters.