---
title: "How to fix decimals arithmetic in JavaScript"
url: https://daily.dev/posts/how-to-fix-decimals-arithmetic-in-javascript-2kkv-zr0n
source_url: https://flaviocopes.com/javascript-decimal-arithmetics/
type: article
source: "Flavio Copes"
published: 2022-04-25T06:11:40.185Z
updated: 2022-04-25T06:11:40.185Z
tags: ["javascript"]
reading_time: 2
upvotes: 10
comments: 1
language: en
---

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# How to fix decimals arithmetic in JavaScript

**[Flavio Copes](https://daily.dev/sources/flaviocopes)** · 2 min read · 10 upvotes · 1 comments

## Summary

If you try to do the sum of two decimal numbers in JavaScript you might have a surprise. The reason is due to the fact computers store data as binary, 0 or 1. Not every decimal number can be represented perfectly in this binary format. Some numbers are repeating numbers in binary. Try to convert 0.1 from decimal to binary.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://flaviocopes.com/javascript-decimal-arithmetics/>

## Community discussion

Top comments from developers on daily.dev.

**@\_fotinovski16925728762628446434127172** · 0 upvotes

> Thanks, Flavio!
> This one helped me a lot 🙌

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Tags: [#javascript](https://daily.dev/tags/javascript)

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