# Round a Number to 2 Decimal Places in JavaScript

This tutorial introduces how to round a number to2 decimal places in JavaScript.

## Use the `.toFixed()` Method to Round a Number To2 Decimal Places in JavaScript

We apply the `.toFixed()` method on the number and pass the number of digits after the decimal as the argument.

``````var numb = 12312214.124124124;
numb = numb.toFixed(2);
``````

This method does not yield accurate results in some cases, and there are better methods than this. If a number rounds of `1.2`, then it will show `1.20`. If a number like `2.005` is given, it will return `2.000` instead of `2.01`.

## Use the `Math.round()` Function to Round a Number To2 Decimal Places in JavaScript

We take the number and add a very small number, `Number.EPSILON`, to ensure the number’s accurate rounding. We then multiply by number with `100` before rounding to extract only the two digits after the decimal place. Finally, we divide the number by 100 to get a max of 2 decimal places.

``````var numb= 212421434.533423131231;
var rounded = Math.round((numb + Number.EPSILON) * 100) / 100;
console.log(rounded);
``````

Output:

``````212421434.53
``````

Although This method improves over `.toFixed()`, it is still not the best solution and will also not round of `1.005` correctly.

## Use Double Rounding to Round a Number To2 Decimal Places in JavaScript

In this method, we use the `.toPrecision()` method to strip off the floating-point rounding errors introduced during the intermediate calculations in single rounding.

``````function round(num) {
var m = Number((Math.abs(num) * 100).toPrecision(15));
return Math.round(m) / 100 * Math.sign(num);
}

console.log(round(1.005));
``````

Output:

``````1.01
``````

## Using the Custom Function to Round a Number To2 Decimal Places in JavaScript

``````function roundToTwo(num) {
return +(Math.round(num + "e+2")  + "e-2");
}
console.log(roundToTwo(2.005));
``````

This custom function takes care of all the corner cases, and rounding of decimals like `1.005` is handled well by this function.

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