---
title: "Pixel Resolution calculator — AperiOptic"
description: "Object-space resolution from sensor pixel pitch. Free online optics calculator, with the formula and code snippets."
url: "https://aperioptic.com/calculators/pixel-resolution"
---

# Pixel Resolution calculator

Object-space resolution from sensor pixel pitch.

Category: [Imaging](https://aperioptic.com/calculators)

Formula: `GSD = p·(u − f)/f (≈ p·u/f for u ≫ f)`

## Inputs

| Input | Parameter | Unit | Default |
| --- | --- | --- | --- |
| Pixel pitch | `p` | µm | 3.45 |
| Distance | `u` | mm | 1000 |
| Focal length | `f` | mm | 25 |

## Result with the default inputs

- Object px size: 134.55 µm
- Object px size: 0.1346 mm

Open it with your own values: put each input in the address as a parameter, for example [`/calculators/pixel-resolution?p=3.45`](https://aperioptic.com/calculators/pixel-resolution?p=3.45). A unit other than the listed one goes in `<parameter>_unit`.

Read more: [Wikipedia: Image resolution](https://en.wikipedia.org/wiki/Image_resolution)

[All optics calculators](https://aperioptic.com/calculators)

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The interactive page: https://aperioptic.com/calculators/pixel-resolution (AperiOptic runs in the browser; free, no account). Every page of the site as Markdown: https://aperioptic.com/llms.txt