Digital Image Size Calculator

Fast, accurate and free online size image cyfrowego calculator tool running directly in your browser.

Secure (SSL)

Client-Side Processing

100% Free

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Instructions

1

Enter data
Enter content, paste text or load a file from disk.
2

Click the button
The tool will immediately process your data in the browser.
3

Get the result
Copy the finished text or save the file to your device.

                                                function runTool() {

                                                  return "Result ready in 0.1s";

                                                }

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Digital Image Size Calculator - Calculate Pixels, DPI and Dimensions

Free online calculator to calculate digital image size in pixels, centimeters, inches and DPI. The perfect tool for graphic designers, photographers and web creators who want to precisely define the dimensions and resolution of their images.

How does the image size calculator work?

The image size calculator converts the relationship between resolution in pixels, the physical size of the image (in cm or inches) and the density of dots per inch (DPI - dots per inch). This allows you to easily determine how large a print or graphic will appear on the screen.

Example:If your image has a resolution of 3000×2000 pixels and 300 DPI, the calculator will show that its physical size is 25.4×16.9 cm.

Why use the Image Size Calculator?

Accurately calculate image dimensions in cm, inches or pixels.
Perfect for preparing photos for printing or the Internet.
Supports DPI and aspect ratio conversions.
Easy to use, no installation or fees.

How to use the tool?

Enter the width and height of the image in pixels.
Enter a DPI value (e.g. 72 for screen or 300 for print).
Click "Calculate" - the tool will show the exact dimensions in cm and inches.
You can also change the resolution and the calculator will recalculate the new values automatically.

Most common uses

Preparation for printing

Check whether your file has sufficient resolution to print in the selected format. The calculator will help you avoid blurry prints and DPI errors.

Optimization for the Internet

Reduce file size without losing quality. Choose the appropriate resolution to make your graphics load faster on websites and social media.

Formulas and relationships

Formulas used in the calculator:

Size in inches = number of pixels / DPI
Size in cm = (pixels / DPI) × 2.54
DPI = pixels / (size in inches)

Typical DPI values

72 DPI- standard for screens and websites.
150 DPI– good quality office printing.
300 DPI– photographic or polygraphic printing.
600 DPI– professional prints and vector graphics.

Tips for graphic designers and photographers

When preparing graphics for printing, always use files with a resolution of at least 300 DPI. Also remember that enlarging low-quality images may result in loss of sharpness. The image size calculator helps you maintain proportions and avoid errors when exporting designs from programs such as Adobe Photoshop, Canva, or GIMP.

Tip:If you want to calculate the size for different aspect ratios, please combine this calculator withAspect Ratio Calculator.

Frequently Asked Questions (FAQ)

What is DPI?

DPI (dots per inch) is the number of dots per inch of print. The higher the DPI, the better the image quality.

How to choose DPI for a project?

For web graphics, 72 DPI is enough. A minimum of 300 DPI is recommended for photographic printing.

Is it possible to convert the other way - from cm to pixels?

Yes, just enter the dimensions in cm and the DPI value, and the calculator will calculate the resolution in pixels.

Does the calculator support RAW images?

Yes, you can enter the resolution of the RAW image and the calculation result wi