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Asked by:

Dragontry

731

I've got two Date objects and I want to calculate the difference between them in hours.

How can I do that?

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Answered by:

Admin Dirask Community

4380

Quick solution:

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Math.abs(date1 - date2) / (1000 * 60 * 60);

Practical example

Using Math.abs() you can get the absolute difference between two dates in milliseconds. Then you need to divide the difference by number of milliseconds in 1 hour (1000 * 60 * 60).

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var date1 = new Date('2022-10-20T00:00:00.000Z');
var date2 = new Date('2022-10-21T00:00:00.000Z');
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var difference = Math.abs(date1 - date2); // absolute difference between dates (in milliseconds)
​
var hour = 1000 * 60 * 60; // milliseconds for one hour
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var result = difference / hour; // result - difference in hours
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console.log(result); // 24