🖥️ Resolution
Convert between pixels, DPI and physical size free. Calculate print dimensions and image resolution requirements instantly.
🖥️ Resolution
🔧 Loading tool…
About the Resolution Tool
The relationship between pixels and physical size is entirely determined by resolution. An image 3000 pixels wide prints at 10 inches if you use 300 DPI, or at 41 inches at 72 DPI — the same file, wildly different output. This is why images that look fine on screen print badly.
Understanding the arithmetic prevents the common disappointment of a web image looking pixelated in print. The standard for quality printing is 300 DPI; screens are typically 72 to 96 PPI, though modern high-density displays exceed that considerably. This calculator handles the conversion in your browser.
How to Use Resolution
- Enter your image dimensions in pixels.
- Enter the resolution in DPI or PPI.
- The resulting physical print size is calculated.
- Adjust the DPI to see how print size and quality trade off.
When to Use This Tool
- Checking whether an image has enough resolution to print at a given size
- Calculating required pixel dimensions for a poster or banner
- Understanding why a web image looks pixelated when printed
- Preparing images to a printer’s specification
- Determining the maximum quality print size from an existing photo
Things Worth Knowing
- 300 DPI is the standard for quality printing; 150 DPI is acceptable for large formats viewed at a distance.
- DPI describes printer dots and PPI describes image pixels, though the terms are used interchangeably in practice.
- Increasing DPI in software without more pixels does not add real detail.
Quick Facts
| Tool name | Resolution |
| Category | Unit Converters |
| Price | Free — no account, no trial, no watermark |
| Where it runs | Entirely in your browser (client-side) |
| Files uploaded | None — your data never leaves your device |
| File size limit | None imposed; limited only by device memory |
| Works offline | Yes, once the page has loaded |
| Platforms | Windows, macOS, Linux, Android, iOS |
Frequently Asked Questions
What DPI do I need for printing?
300 DPI for photographs and material viewed close up. Large-format work like banners and billboards can use 150 DPI or considerably less, because viewing distance is much greater.
How do I calculate print size from pixels?
Divide pixel dimensions by DPI. A 3000×2000 pixel image at 300 DPI prints at 10×6.67 inches. At 150 DPI it prints twice as large, with correspondingly less detail.
Can I increase an image’s DPI to improve print quality?
Not meaningfully. Changing the DPI value alone just relabels the same pixels. Upscaling adds interpolated pixels, not real detail — the sharpness is not recovered.
What is the difference between DPI and PPI?
PPI counts pixels per inch in a digital image; DPI counts ink dots per inch a printer lays down. They are conceptually distinct but used interchangeably in everyday workflow discussion.