How to Round a Number to Two Decimals

Quick start with the toFixed method, Math.round utility and the Intl.NumberFormat object

Rounding a number to two decimals sounds like a simple problem but it was a challenge when using the previous built-in functions. The good news is that now we have a better correct solution.

toFixed returns a string representation of a number having exactly the specified number of digits after the decimal place.

Below is an example giving the correct result.

The result of toFixed is a string. We can simply convert back to a number using the Number built-in utility.

The only problem is that toFixed does not always give the correct result when rounding a number. For 1.255 it returns 1.25 but it should be 1.26.

Another option is the Math.round utility.

Math.round rounds a number to the nearest integer.

Below is an example giving the correct result.

However, this approach returns also the wrong result for 1.255.

A proposed “fix” for this problem is the addition of the Number.EPSILON value before rounding the number.

The Number.EPSILON is the smallest positive number approaching zero.

This solved the previous issues but creates a new one. The following result is wrong. It should be 1.25

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