Whether you're preparing a copyright photo, printing a flyer, or formatting a document, you may need to resize an image in centimeters (cm) instead of pixels. While most tools work with pixels by default, many online and offline tools now make it easy to resize your image in centimeters—no advanced design skills needed.
In this blog, we’ll show you exactly how to resize an image in cm online for free, with step-by-step instructions and helpful tools.
???? Why Resize an Image in CM?
Here are some common reasons to resize an image in centimeters:
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???? copyright or visa photo requirements
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????️ Print-ready files like posters, brochures, or ID cards
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???? School or college assignments with strict dimension guidelines
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???? Official document submissions
Unlike pixels, centimeters are a real-world physical measurement, which is ideal for anything that will be printed.
???? Pixels vs. Centimeters: What's the Difference?
| Metric | Description |
|---|---|
| Pixels | Digital unit, depends on screen resolution |
| Centimeters | Physical length, used for print and real-world sizing |
| Conversion | 1 cm ≈ 37.8 pixels (at 96 DPI) |
???? Tip: To convert cm to pixels, use the formula:
cm × DPI ÷ 2.54 = pixels
Example: 5cm × 300 DPI ÷ 2.54 = ~590 pixels
???? Best Free Tools to Resize Image in CM Online
| Tool Name | Features | Website |
|---|---|---|
| IMG2Go | Resize by cm, mm, or inches | img2go.com |
| ResizePixel | Resize using physical units like cm | resizepixel.com |
| Photopea | Free online editor with cm support | photopea.com |
| Fotor | Resize, crop, and adjust resolution | fotor.com |
???? How to Resize an Image in CM Step-by-Step
Using ResizePixel:
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Visit resizepixel.com
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Upload your image
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Choose centimeters as your unit
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Enter your desired width and height
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Set the DPI (dots per inch) – usually 300 DPI for print
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Click Resize and download your image
???? Pro Tips for Accurate Resizing
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Set DPI before resizing if the tool allows. Common DPI values:
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300 DPI for printing
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96 DPI for web use
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Keep proportions locked to avoid image distortion
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Use original high-resolution images to maintain clarity
???? When Do You Need Precise CM Resizing?
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copyright photos (e.g., 3.5cm x 4.5cm)
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Government documents
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Printed marketing material
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College projects or assignments
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Art and photography prints
Final Thoughts
Resizing an image in centimeters online is easier than ever. By using the right tools and understanding DPI settings, you can ensure your images meet exact physical dimensions without losing quality.