Date Calculator

A comprehensive suite of date and time calculation tools, including time difference, working days, date addition and subtraction, and more.

Date Calculator - Professional Online Date and Time Calculation Tools

The date calculator is a professional collection of online date and time calculation tools, providing a time difference calculator, working days calculator, date addition/subtraction calculator and other practical features. These date calculators support precise date and time calculations, global timezone conversion and intelligent holiday handling, making them ideal for project management, contract calculations, payroll statistics and birthday countdowns. All date calculators are completely free to use with no installation required.

Time Difference Calculator

Calculates the precise difference between two date-time points, supporting multiple units such as years, months, days, hours, minutes, and seconds.

Main Features:

  • Accurately calculate differences in years, months, days, hours, minutes, and seconds, supporting millisecond precision
  • Support for over 200 global time zones with intelligent conversion
  • Automatically count working days and weekends, with customizable workday settings
  • Provide total displays and visual charts for various time units

Business Days Calculator

Calculates the number of working days between two dates, excluding weekends and holidays.

Main Features:

  • Intelligent recognition of working day modes, supporting flexible calculation options

Date Addition and Subtraction Calculator

Adds or subtracts a specified time interval from a given date.

Main Features:

  • Automatically save calculation history, supporting one-click application and management of history records

The date calculator is a professional collection of online date and time calculation tools, providing a time difference calculator, working days calculator, date addition/subtraction calculator and other practical features. These date calculators support precise date and time calculations, global timezone conversion and intelligent holiday handling, making them ideal for project management, contract calculations, payroll statistics and birthday countdowns. All date calculators are completely free to use with no installation required.

Date Calculator Features

Precise Calculation

The date calculator supports millisecond-level time calculation precision, with detailed display in years, months, days, hours, minutes and seconds to ensure accuracy of results.

Global Timezone Support

The date calculator supports over 200 timezones worldwide with intelligent conversion, automatically handling daylight saving time adjustments for cross-timezone calculations.

Intelligent Holiday Handling

The date calculator automatically recognises and processes public holidays for various countries, supporting working day calculations for accurate data in project management and payroll.

Completely Free

All date calculator tools are completely free, requiring no account registration, download or installation - simply open the webpage and start calculating.

Date Calculator Use Cases

Project Management

Use the date calculator to compute project durations, milestone intervals and working day statistics, helping project managers accurately track progress and schedules.

Payroll Calculation

Precisely calculate the number of working days, overtime hours and leave days using the date calculator, providing accurate payroll data for HR and finance teams.

Contract Management

Use the date calculator to compute contract durations, lease periods and service terms, helping legal and commercial teams accurately track key deadlines.

Life Planning

Calculate birthday countdowns, anniversaries, holiday schedules and other important dates with the date calculator, making it your personal life assistant.

Date Calculator FAQ

How do I use the date calculator?

Using the date calculator is very straightforward: select the date calculation tool you need (time difference calculator, working days calculator, or date addition/subtraction calculator), enter the relevant date and time parameters, and the date calculator will automatically compute and display the results. All date calculators support timezone selection and history saving.

Related Date Calculator Tools

Time Difference Calculator

Precisely calculate the difference between two dates and times, with multi-timezone support

Working Days Calculator

Calculate working days, automatically excluding weekends and public holidays

Date Addition/Subtraction Calculator

Add or subtract time from a specified date to quickly obtain the target date

Timezone Converter

Global timezone conversion, supporting 200+ timezone queries