Day Hour Calculator



Calculating the duration between two dates or times can be a crucial task in various situations. Whether you are managing projects, planning events, or simply curious about the time elapsed, a Day Hour Calculator can be a handy tool. In this article, we will provide you with a functional calculator code using HTML and JavaScript, along with explanations on its usage and the underlying formula.

How to Use

To utilize the Day Hour Calculator, follow these simple steps:

  1. Input the start date and time.
  2. Input the end date and time.
  3. Click the “Calculate” button.

The result will be displayed instantly, showing the duration in days and hours.


The accurate formula for calculating the duration between two timestamps is:

Duration (in hours)=(End Date−Start Date)×24

This formula takes into account both the date and time components to provide a precise result.


Suppose you want to find the duration between January 1, 2023, 12:00 PM, and January 5, 2023, 6:30 AM. Using the formula:

The result will be displayed as days and hours.


Q1: What date and time format should I use?

A1: Input the dates and times in the format YYYY/MM/DD HH:mm for accurate calculations.

Q2: Can I calculate durations across different months or years?

A2: Yes, the calculator considers both date and time components, allowing calculations spanning various time intervals.

Q3: Is the result rounded off to the nearest hour?

A3: No, the calculator provides a precise result, including fractional hours.


In conclusion, the Day Hour Calculator presented here is a powerful tool for anyone needing accurate duration calculations. Its simplicity and precision make it ideal for a variety of applications, from project management to personal timekeeping.

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