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JavaScript - Math.round to 2 decimal places

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In this article, we would like to show you how to round a number to 2 decimal places in JavaScript.

The main concept to get our value rounded to 2 decimal places is to multiply it by 100, round it with Math.round() function and then divide by 100 again.

Runnable example:

// ONLINE-RUNNER:browser;

const round = (value) => {
	return Math.round(100 * value) / 100;  // <----------
};

// Usage example:

console.log( round(  1.2345 ) ); //  1.23
console.log( round( -1.2345 ) ); // -1.23

console.log( round(   12345 ) ); // 12350

console.log( round(   5  ,  0 ) ); // 5
console.log( round(   5. ,  0 ) ); // 5
console.log( round(  .5  ,  0 ) ); // 1

References

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