Know your image ratio
An aspect ratio describes width relative to height. A 1920 × 1080 image reduces to 16:9, the familiar widescreen shape. Enter any two positive dimensions to see the simplified ratio.
THE IMAGE WORKSHOP / 001
Give every image
its proper place.
An image resizer, aspect ratio calculator, and print-size guide. Three precise tools. One considered workspace. Nothing to install.
Explore the tools 01—03 / Free to use · Files stay on your device
01 / THE WORKSPACE
Small tools.
Sharper decisions.
Work with dimensions, not guesswork. Pick a tool, enter your values, and get straight to the result.
Aspect ratio calculator
Turn width and height into a clean, simplified ratio.
SIMPLIFIED ASPECT RATIO
16 : 9
Landscape format · 1.7778:1
Try a popular ratio
Change either number and the ratio updates automatically.
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Quick export sizes
Add an image to activate the download.
The quality slider affects JPEG and WebP; PNG export is lossless. Padding uses the chosen background color.
Check your image's maximum print size at a chosen resolution.
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PRINT DIMENSIONS AT SELECTED PPI10 × 8 in25.4 × 20.32 cm
Based on image pixel dimensions; actual print results vary by printer, viewing distance and image quality.
Tip: 300 PPI is a common target for sharp close-viewed prints, not a universal requirement.
02 / THE COLLECTION
One job at
a time.
Each tool page provides a live calculator, examples, step-by-step instructions and answers to common questions.
Image aspect ratio calculatorCalculate a simplified width-to-height ratio from any image dimensions, without uploading files.Open interactive tool →
Free online image resizerChoose an image, set exact pixel dimensions and download a JPG, PNG or WebP file.Open interactive tool →
Pixel to print size calculatorCalculate printable inches and centimeters from image pixels and your selected pixels per inch (PPI).Open interactive tool →
03 / THE DETAILS
Built on simple,
sound principles.
Resize on your terms
Choose exact output dimensions. Keep the full image with padding, crop from its center to fill a frame, or stretch when distortion is acceptable. Save as PNG, JPEG or WebP.
Print without surprises
Print size in inches equals pixel dimensions divided by PPI. A 3000-pixel-wide photo at 300 PPI can print 10 inches wide. Larger prints can work at lower PPI when viewed farther away.
04 / FIELD NOTES
A few useful
reference points.
| Use case | Dimensions | Aspect ratio |
|---|---|---|
| Square social image | 1080 × 1080 | 1:1 |
| Portrait social post | 1080 × 1350 | 4:5 |
| Vertical story / short video | 1080 × 1920 | 9:16 |
| HD video / thumbnail | 1280 × 720 | 16:9 |
| Standard DSLR photo | 6000 × 4000 | 3:2 |
Platform display and upload requirements can change; verify with the publishing platform before final export.
05 / GOOD TO KNOW
The useful
fine print.
How do I calculate the aspect ratio of an image?
Enter its width and height in pixels. Divide both dimensions by their greatest common divisor (GCD). For example, 1080 × 1920 reduces to 9:16.
Does resizing an image lower its quality?
Reducing dimensions discards pixels. Enlarging dimensions requires adding estimated pixels and cannot recreate missing detail. JPEG and WebP compression may also reduce visible detail.
Are my images uploaded to your servers?
No. The image resizer uses your browser's built-in image and canvas APIs. Your selected image stays on your device during processing.
What is the difference between PPI and DPI?
PPI measures image pixel density at a print size. DPI measures how a printer places ink or toner dots. They are related in printing, but they are not the same measurement.
Can I resize without changing an image's ratio?
Yes. Keep “Lock aspect ratio” selected. To fit a specific target frame without distortion, use the Fit or Fill options rather than Stretch.
Is the calculator really free?
Yes. All three tools are free to use with no account, subscription or watermark.