# PixelCalc — Photo Image Tools for iPhone

> Image dimension converter and proportional resizing tool with reference charts. (iPhone/iPad app by John Lullie.)

- Source: https://appshunter.io/ios/app/pixelcalc/id370571599 (this page in markdown: same URL + `.md`)
- Developer: [John Lullie](https://appshunter.io/developer/370571602)
- Category: Productivity, Utilities
- Price: $2.99
- Age rating: 4+
- Requires: iOS 11.0 · 4 MB
- Languages: American English
- Released: 2010-05-07
- Data updated: 2026-08-12
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/pixelcalc/id370571599/reviews.md

## What is PixelCalc?

PixelCalc is a very convenient tool for anyone working with digital images, whether from a Camera, scanner or other input device. It is especially useful for graphic designers who work with both Web and Print media. Either of these two areas of media frequently require conversions from Pixels to Inches and Inches to Pixels along with a desired Resolution (i.e. hi-res, medium-res or low-res). 

Now includes a Proportional Calculator and useful Reference Charts.

Proportional Calculator
The Proportional Calculator will instantly calculate enlargements or reductions of images, photos, artwork, layouts, or any kind of design. Basically, anything that needs to be resized accurately while maintaining perfect proportions, the Proportional Calculator will do it.

Contains the following handy reference charts:
-Maximum Print Size per Megapixels (different resolutions)
-Maximum Print Sizes (in inches) by Megapixels @ 300ppi
-Shutter Speed Chart (Useful camera tool for perfect shots!)
-See the charts in the app for detailed reference information

## Key features

- Pixel to Inch conversion
- Inch to Pixel conversion
- Resolution adjustment
- Proportional calculator for resizing
- Print size reference charts
- Camera shutter speed chart

## Recent user reviews (10 of 12)

All indexed reviews: https://appshunter.io/ios/app/pixelcalc/id370571599/reviews.md

### 3/5 — App works but needs some updates

*2020-10-26*

What it does have seems to work. It would be better if the user would be able to enter the megapixel and dpi as an input and not a slider. Many cameras have larger megapixels then this app allows. It would be better to enter a dpi as the slider does not allow enough choices. The proportional calculator should auto calculate x and not need to press resize. It would also be helpful to have a choice to get a list of different size.

### 4/5 — Pixel Calc icon not showing. Shows up as a generic icon-iOS 10.

*2017-12-27*

See Above.

### 1/5 — Waste of money

*2015-07-11*

DPi is not changeable. Stuck on 72dpi. Worthless.

### 1/5 — PixelCalc

*2015-06-03*

Worthless app for iPhone 5 - No slider to change dpi. Stuck at 72 dpi.

### 4/5 — Give it 4 stars.

*2012-11-09*

Just missing the 360 ppi for epson printers.

### 3/5 — Good

*2012-10-07*

Some useful tools here but needs retina support as some of the text looks pixelated, which is ironic considering that this app deals with resolution. What's puzzling is that there is no way to choose 240dpi, which is my camera's default dpi - some improvements to be made but as you're usually in front of a computer when determining your printing specs, having this app available for the iPhone seems a bit useless.

### 4/5 — Recommend

*2012-02-04*

Great app... Does everything I need and they have great support if you ever need it.

### 5/5 — Great little app

*2011-08-23*

Perfect for when away from Photoshop or stuck at a party and asked questions about megapixels, etc. Love the new proportions calculator, wish all my fellow artists would use this app, save me the explaining.

### 5/5 — Excellent!

*2010-12-02*

This is what the first version should have been. Nice work on the update!

### 1/5 — Dpi slider broken

*2010-07-30*

The resolution is stuck at 72dpi. Can't slide it. Can you fix or refund?

## Frequently asked questions about PixelCalc

### What is PixelCalc used for?

PixelCalc is a tool for converting image dimensions between pixels and inches at specified resolutions. It also includes a proportional calculator for accurate resizing and reference charts for print sizes and camera settings.

### How much does PixelCalc cost?

PixelCalc is a paid application, available for $2.99. This one-time purchase grants you access to all its features.

### Does PixelCalc have ads?

No, PixelCalc does not contain advertisements. As a paid app, it offers an ad-free experience for its users.

### What devices is PixelCalc compatible with?

PixelCalc is designed for Apple devices, including iPhone, iPad, and iPod. It requires iOS 4 or later.

### How often is PixelCalc updated?

The app was last updated on October 27, 2025, indicating ongoing support and potential for future improvements. Version 1.81.4 is the latest release.

### What kind of reference charts are included in PixelCalc?

PixelCalc includes handy reference charts such as Maximum Print Size per Megapixels (at different resolutions), Maximum Print Sizes in inches by Megapixels @ 300ppi, and a Shutter Speed Chart for camera use.

### Is PixelCalc suitable for professional graphic designers?

Yes, PixelCalc is especially useful for graphic designers working with both web and print media, as it frequently requires conversions between pixels and inches with desired resolutions.

### What is the age rating for PixelCalc?

PixelCalc has an age rating of 4+, making it suitable for a wide range of users, including younger individuals who may be learning about image dimensions.

## Version history (last 5 releases)

### 1.81.5 — 2026-04-08

Updated to support that latest iOS versions.
Minor tweaks and enhancements.

### 1.81.4 — 2025-10-27

Added all the Social Media image sizes for the most popular platforms.

### 1.81.3 — 2025-10-23

Minor bug fix and performance enhancements.
Updated for the latest iOS release.

### 1.81.2 — 2025-10-20

Added a Color Converters for RGB to HEX colors, and HEX colors to RGB colors. Also added Color Converter for RGB to CMYK and CMYK to RGB.
A few other minor updates.

### 1.80.1 — 2025-07-26

Updated to support the latest iOS.
Speed enhancements across the entire app.

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## More apps by John Lullie

- [Action-Packed Marketing](https://appshunter.io/ios/app/action-packed-marketing/id375562845)
- [Hang-a-Pic](https://appshunter.io/ios/app/hang-a-pic/id380232763)
- [GrassMaster](https://appshunter.io/ios/app/grassmaster/id386256016)
- [iKeyMaster:Blender3D](https://appshunter.io/ios/app/ikeymasterblender3d/id401788269)
- [iKeyMaster:Windows](https://appshunter.io/ios/app/ikeymasterwindows/id411784227)

All apps by John Lullie: https://appshunter.io/developer/370571602

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-12.*