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Photo Resizer in CM – Resize Image in Centimetres
Resize photos to exact centimetre or millimetre dimensions for passport, visa, and ID applications. Enter cm values below and we'll convert to pixels automatically.Upload multiple images for batch processing. Your files never leave your device. 100% free & private.
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CM to Pixels Conversion Chart (at 300 DPI)
Digital images are measured in pixels, but many government forms specify dimensions in centimetres (cm) or millimetres (mm). Use this chart to find the pixel equivalent of your required cm size:
| Size (CM) | Size (MM) | Pixels (300 DPI) | Common Use |
|---|---|---|---|
| 2 × 2 cm | 20 × 20 mm | 236 × 236 px | Small stamps |
| 2.5 × 3.5 cm | 25 × 35 mm | 295 × 413 px | Stamp-size photos |
| 3.5 × 4.5 cm | 35 × 45 mm | 413 × 531 px | Indian passport / visa |
| 5 × 2 cm | 50 × 20 mm | 591 × 236 px | Signature (UPSC/SSC) |
| 5.1 × 5.1 cm | 51 × 51 mm | 602 × 602 px | US passport |
| 6 × 3 cm | 60 × 30 mm | 709 × 354 px | Signature scans |
How to Resize Photo in CM
- Find your pixel equivalent: Use the chart above to convert your cm requirement to pixels at 300 DPI.
- Upload your photo: Drop the image into the tool above.
- Switch to Dimensions mode: Click the Width × Height tab.
- Enter pixel values: Type the calculated pixel dimensions.
- Download: Your photo is now the exact cm size when printed at 300 DPI.
Common Exam Sizes in CM
- SSC photo in cm: 3.5 × 4.5 cm (413 × 531 px) — SSC Photo Resizer
- SSC signature size in cm: 5 × 2 cm (140 × 60 px preferred) — Signature Resizer
- UPSC photo size in cm: 3.5 × 4.5 cm — UPSC Photo Resizer
- Passport photo size in cm India: 3.5 × 4.5 cm — Passport Photo Resizer
Frequently Asked Questions
How do I resize an image to 3.5 × 4.5 cm?→
This is the standard Indian passport size. At 300 DPI (print quality), 3.5 × 4.5 cm equals 413 × 531 pixels. Upload your photo, set dimensions to 413 × 531 px, and resize. The output will be exactly 3.5 × 4.5 cm when printed at 300 DPI.
What is the pixel equivalent of common cm sizes?→
At 300 DPI: 2 × 2 cm = 236 × 236 px; 3.5 × 4.5 cm = 413 × 531 px; 5 × 5 cm = 591 × 591 px; 5 × 7 cm = 591 × 827 px. At 96 DPI (screen): divide by 3.125.
What is 50mm × 20mm in pixels?→
50mm × 20mm equals 5 cm × 2 cm. At 300 DPI, this is 591 × 236 pixels. This is a common size for signature images on Indian government portals (UPSC, SSC, IBPS). Use dimensions of 140 × 60 px for the preferred digital format.
How do I resize a photo to passport size in cm?→
Indian passport size is 3.5 × 4.5 cm (35 × 45 mm). US passport size is 5.1 × 5.1 cm (2 × 2 inches). Upload your photo, enter the pixel equivalent at 300 DPI, and our tool will resize it perfectly.