Round off a number to the next multiple of 5 using JavaScript

How to Round off Time to Nearest 5 Min using JavaScript?

Last Updated : 14 Oct, 2024

To round off time to the nearest 5 minutes in JavaScript, extract the minutes from a Date object, round them to the nearest multiple of 5, and set the updated time back into the Date object.

Below are the approaches to round off time to the nearest 5 minutes:

Table of Content

Using Math.floor() function
Using Math.round() function

Approach 1: Using Math.floor() function

In this approach, both options are available to either round down or round up the date object. This example uses the basic Math.floor() function and Math.ceil() function to perform the operation.

Example: This example implements the above approach.

JavaScript

let date = new Date();

console.log("Initial Date: ", date);

function roundDownDate() {
    let coff = 1000 * 60 * 5; // milliseconds in 5 minutes
    let roundedDownDate = 
    	new Date(Math.floor(new Date() / coff) * coff);
    console.log("Rounded Down Date: ", roundedDownDate);
}

function roundUpDate() {
    let coff = 1000 * 60 * 5; // milliseconds in 5 minutes
    let roundedUpDate = new Date(Math.ceil(new Date() / coff) * coff);
    console.log("Rounded Up Date: ", roundedUpDate);
}

roundDownDate();
roundUpDate();

Output

Initial Date:  2024-10-14T09:24:52.076Z
Rounded Down Date:  2024-10-14T09:20:00.000Z
Rounded Up Date:  2024-10-14T09:25:00.000Z

Approach 2: Using Math.round() function

This approach uses basic Math.round() function to perform the operation. Calculate the milliseconds in 5 minutes, divide the date object by milliseconds and get the round value then again multiply the milliseconds.

Example: This example implements the above approach.

JavaScript

let date = new Date();

console.log("Original Date: ", date);

function roundOff() {
    let coff = 1000 * 60 * 5; // milliseconds in 5 minutes
    let roundedDate = new Date(Math.round(date.getTime() / coff) * coff);
    console.log("Rounded Date: ", roundedDate);
}

roundOff();

Output

Original Date:  2024-10-14T09:25:00.654Z
Rounded Date:  2024-10-14T09:25:00.000Z

Round off a number to the next multiple of 5 using JavaScript

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PranchalKatiyar

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