# How to Calculate Hours Difference Between Two Dates in Javascript?

Hi Dev,

Here, I will show you how to calculate hours difference between two dates in javascript?. This tutorial will give you simple example of calculate hours difference between two dates in javascript example. I would like difference between two dates calculat in hour.

I would like to share with you javascript get between two date difference hours javascript. I explained simply about between two dates javascript calculate hours.

Let's start following example.

Solution:
```
<script type="text/javascript">

function timeDiffCalc(dateFuture, dateNow) {

let diffInMilliSeconds = Math.abs(dateFuture - dateNow) / 1000;

/// calculate hours
const hours = Math.floor(diffInMilliSeconds / 3600) % 24;
diffInMilliSeconds -= hours * 3600;

let difference = '';

difference += (hours === 0 || hours === 1) ? `\${hours} hour ` : `\${hours} hours `;

return 'Calculated = ' + difference;
}

console.log(timeDiffCalc(new Date('2022/08/1 01:40:00'), new Date('2022/12/8 12:10:00')));

</script>

```
Output:
`Calculated = 10 hours`
#Javascript