content/snippets/js/s/remove-trailing-zeros.md
---
title: How can I remove trailing zeros from a number in JavaScript?
shortTitle: Remove trailing zeros from number
type: story
language: javascript
tags: [math]
cover: island-corridor
excerpt: When formatting decimal values in JavaScript, trailing zeros can be undesired. Here's how to deal with them.
listed: true
dateModified: 2024-02-01
---
JavaScript provides a couple of ways to format numeric values to a given precision. Namely, you can use `Number.prototype.toFixed()` and `Number.prototype.toPrecision()` to similar effect. However, neither of them deals with trailing zeros in the decimal part. Here's a few ways you can remove them.
## Regular expression
Provided that the number is converted to a **fixed-point string**, you can use a regular expression to remove trailing zeros. All you have to do is match the decimal point (`\.`) and replace any zeros after it (`0+`) until the end of the string (`$`).
```js
const toFixedWithoutZeros = (num, precision) =>
num.toFixed(precision).replace(/\.0+$/, '');
toFixedWithoutZeros(1.001, 2); // '1'
toFixedWithoutZeros(1.500, 2); // '1.50'
```
The main issue with this approach is that the regular expression will only remove trailing zeros **if the decimal part has no other digits** before them. Writing a regular expression to remove trailing zeros from any number is a bit more involved and gets harder to read. Thus, this approach is discouraged.
## Multiply by 1
A better way to remove trailing zeros is to multiply by `1`. This method will remove trailing zeros from the decimal part of the number, **accounting for non-zero digits** after the decimal point. The only downside is that **the result is a numeric value**, so it has to be converted back to a string.
```js
const toFixedWithoutZeros = (num, precision) =>
`${1 * num.toFixed(precision)}`;
toFixedWithoutZeros(1.001, 2); // '1'
toFixedWithoutZeros(1.500, 2); // '1.5'
```
## Number.parseFloat
Similar to the previous approach, you can use `Number.parseFloat()` to remove trailing zeros from a number. This method also accounts for non-zero digits after the decimal point. We recommend this approach as it's the **most readable**.
```js
const toFixedWithoutZeros = (num, precision) =>
`${Number.parseFloat(num.toFixed(precision))}`;
toFixedWithoutZeros(1.001, 2); // '1'
toFixedWithoutZeros(1.500, 2); // '1.5'
```