# Fixed Point Arithmetic

**URL:** <https://forum.devtalk.com/t/fixed-point-arithmetic/25677>\
**Category:** In The News\
**Created:** [18 October 2021 13:45 UTC](https://forum.devtalk.com/t/fixed-point-arithmetic/25677 "2021-10-18T13:45:46Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![CommunityNews](https://forum.devtalk.com/user_avatar/forum.devtalk.com/communitynews/32/1113_2.png) [@CommunityNews](https://forum.devtalk.com/u/CommunityNews)\
**Post date:** [18 October 2021 13:45 UTC](https://forum.devtalk.com/t/fixed-point-arithmetic/25677/1 "2021-10-18T13:45:46Z")

</div>

> ## What’s the point of `fixed point`?
> 
> Fixed point is the **solution to a problem.**
> 
> **Problem** : I want to do arithmetic with fractional resolution _but_ I can’t afford the CPU cycles to use floating point.
> 
> **Solution** : Fixed point.

[![](https://img.youtube.com/vi/hTylkIGVnuc/maxresdefault.jpg "#9 - Fixed point arithmetic") ](https://www.youtube.com/watch?v=hTylkIGVnuc)

Read in full here:

[https://vha3.github.io/FixedPoint/FixedPoint.html](https://vha3.github.io/FixedPoint/FixedPoint.html)

_This thread was posted by one of our members via one of our news source trackers._

---

<div class="post-metadata">

**Author:** ![OvermindDL1](https://forum.devtalk.com/user_avatar/forum.devtalk.com/overminddl1/32/52_2.png) [@OvermindDL1](https://forum.devtalk.com/u/OvermindDL1)\
**Post date:** [19 October 2021 16:19 UTC](https://forum.devtalk.com/t/fixed-point-arithmetic/25677/3 "2021-10-19T16:19:28Z")

</div>

> **Problem** : I want to do arithmetic with fractional resolution _but_ I can’t afford the CPU cycles to use floating point.

Not the only reason you’d want to use fractional resolution but not floating resolution. Like money is a big reason to use fixed point if it can be divided by powers of two evenly (though really, just keep it as an integer of the lowest monatary unit value).