Date Calculator
Date interval calculation, date addition/subtraction, age calculation, workday calculation
📅 Calculate interval between two dates
What is a Date Calculator?
A date calculator is a tool for calculating date intervals, date addition/subtraction, age calculation, and workday statistics. It helps you quickly calculate the number of days between two dates, project specific dates, calculate exact age, etc. It is widely used in project management, HR attendance, life planning, and other scenarios.
How to Use
Date Interval Calculation
- Select the "Date Interval" tab
- Enter start date and end date
- Click "Calculate Interval" button
- View results: days, weeks, months, years, hours/minutes/seconds
Date Addition/Subtraction
- Select the "Add/Subtract" tab
- Enter start date
- Select add (forward) or subtract (backward)
- Enter value and select unit (day/week/month/year)
- Click "Calculate Result" to see target date
Age Calculation
- Select the "Age Calculator" tab
- Enter birth date
- Click "Calculate Age" to see exact age, total days, next birthday, etc.
FAQ
Q: Does the date interval calculation include the start and end dates?
A: The result is the number of days between the two dates. To include both dates, add 1 day manually.
Q: How does date addition/subtraction handle cross-month/cross-year?
A: The tool automatically handles cross-month and cross-year calculations. For example, January 31 plus 1 month gives February 28 (or 29).
Q: How to exclude holidays in workday calculation?
A: In workday calculation, you can manually enter the number of holiday days, which will be deducted from workdays.
Q: What standard is used for the zodiac in age calculation?
A: Based on the Chinese zodiac, determined by the earthly branch corresponding to the birth year.