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To resize a photo to 300×400 pixels, upload it below, crop to the locked 3:4 frame and tap Process — you get a 300×400 px JPG under 50 KB. 300×400 px equals 3.81 × 5.08 cm at 200 DPI.
300×400 pixels in cm and inches
| DPI | Centimetres | Inches |
|---|---|---|
| 96 DPI | 7.94 × 10.58 cm | 3.13 × 4.17 in |
| 200 DPI | 3.81 × 5.08 cm | 1.50 × 2.00 in |
| 300 DPI | 2.54 × 3.39 cm | 1.00 × 1.33 in |
FAQs
How do I resize a photo to 300×400 pixels?
Upload it in the tool on this page. The crop box is locked to 300:400; tap Process and the image is saved as a 300×400 px JPG within under 50 KB. You can change the KB range in the tool.
What is 300×400 pixels in cm?
It depends on DPI: 7.94 × 10.58 cm at 96 DPI, 3.81 × 5.08 cm at 200 DPI and 2.54 × 3.39 cm at 300 DPI. Exam portals check pixels, not cm.
Is 300×400 the same as 400×300 (400px 300px)?
Forms usually write width first: 300 px wide and 400 px tall (portrait). If a form says "400px 300px" or "400×300" for a photo, it is the same 300×400 size — this tool makes exactly that.
Can I make a 300×400 photo under 20 KB?
Yes. The tool is preset to under 50 KB; change the KB box to any limit (for example 20 KB or 50 KB) before tapping Process. If a form says “less than 300 pixel width and height”, 300×400 px is safe only if the limit is “up to”; otherwise pick a slightly smaller size with JPG resize.
Other popular sizes
Need a different size? Use JPG resize to set any width, height and KB.
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This page answers all of these searches — same size, same tool:
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