IN/PX
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Adobe Photoshop Tutorial

How to Change Pixels to Inches in Photoshop

Complete workflow for setting document dimensions, checking print DPI, and adjusting units in Adobe Photoshop.

Image Size ShortcutCtrl + Alt + I (Win) / Cmd + Option + I (Mac)
Ruler ShortcutCtrl + R / Cmd + R
Standard Print DPI300 Pixels/Inch
Standard Web DPI72 or 96 Pixels/Inch
Interactive Live CalculatorPre-calibrated for Photoshop Prepress Guide
DPI / PPI:
DPI
21.59 cm / 215.9 mm
Inches
Pixels
27.94 cm / 279.4 mm
Inches
Pixels
Display Precision:
Aspect Ratio Preview8.5:11 (US Letter)
8.5" (2550px)11" (3300px)
2550 × 3300
8.41 MPPortrait
Total Pixels
8,415,000
Megapixels
8.41 MP
Diagonal
13.9" / 4170.43px
Instant Developer ExportOne-click copy
Designer & Printmaker Preset Trays:

Overview & Resolution Specifications

Whether preparing a digital illustration for gallery printing or checking photo dimensions, Adobe Photoshop makes switching between pixels and inches seamless via the Image Size dialogue and ruler preferences.

Step-by-Step Instructions

1

Open Image Size Dialogue

Ctrl + Alt + I

Navigate to Image > Image Size in the top menu, or press Ctrl+Alt+I (Windows) / Cmd+Option+I (Mac).

2

Change Dimension Units to Inches

Click the dropdown unit menu next to Width and Height and change it from "Pixels" to "Inches".

3

Configure Resample Option

To resize the canvas without losing original pixels, UNCHECK "Resample". If you want Photoshop to interpolate new pixels, leave "Resample" checked.

4

Adjust Target Resolution

Set the Resolution field to 300 Pixels/Inch for professional printing, or 96 Pixels/Inch for digital display.

5

Enable Workspace Rulers

Ctrl + R

Press Ctrl+R (Cmd+R) to show rulers, then right-click either ruler and select "Inches" for live canvas measurement.

Frequently Asked Questions

Why did my image quality decrease when changing to inches in Photoshop?
If "Resample" is checked and you lower the resolution or dimensions, Photoshop discards pixel data. Always duplicate your layer before downsampling.