# Nano vs uno: max sketch size differences, why?

**URL:** <https://forum.arduino.cc/t/nano-vs-uno-max-sketch-size-differences-why/901931>\
**Category:** Programming\
**Created:** [September 3, 2021, 12:57pm UTC](https://forum.arduino.cc/t/nano-vs-uno-max-sketch-size-differences-why/901931 "2021-09-03T12:57:08Z")\
**Posts on this page:** 1\
**Showing post:** 1

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**Author:** ![iduranb](https://avatars.discourse-cdn.com/v4/letter/i/f6c823/32.png) [@iduranb](https://forum.arduino.cc/u/iduranb)\
**Post date:** [September 3, 2021, 12:57pm UTC](https://forum.arduino.cc/t/nano-vs-uno-max-sketch-size-differences-why/901931/1 "2021-09-03T12:57:08Z")

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Why the max sketch size in a nano is 30720bytes and in uno is 32256 bytes????

It´s supposed to be the same microcontroller, ATmega328P, I don´t understand.

\*\*\* It´s possible to get max sketch size of 32256 bytes in a nano? How?

Thanks in advance!!

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