Pixels to CM Converter Online
Instantly calculate centimeters and millimeters from pixel dimensions at 300 DPI or any custom resolution, then resize your photo in one click.
413 × 531 px
0.22 MP @ 300 DPI
3.5 × 4.5 cm
1 cm = 118.11 px
35 × 45 mm
1 mm = 11.81 px
1.38 × 1.77 in
1 in = 300 px
Formula: CM = (px × 2.54) ÷ 300 → 413 × 531 px = 3.5 × 4.5 cm
Supports JPG, PNG, HEIC, WEBP, PDF, SVG, TIFF, AVIF, GIF, BMP
No files selected yet. Drag & drop photos, documents or click browse above.
Common Pixel to Centimeter Dimensions at 300 DPI
Quick reference guide for official document and photo sizes:
| Standard Size Name | Dimensions in CM | Dimensions in Pixels (300 DPI) | Common Application |
|---|---|---|---|
| Indian / UK / EU Passport | 3.5 × 4.5 cm | 413 × 531 px | Passports, Visas, SSC & UPSC |
| US Visa / DS-160 | 5.08 × 5.08 cm (2×2 in) | 600 × 600 px | US Visa, Green Card Lottery |
| Stamp Size Photo | 2.5 × 3.5 cm | 295 × 413 px | Identity badges, bus passes |
| Official Exam Signature | 4.0 × 2.0 cm | 472 × 236 px | SSC, Banking & State exams |
| Standard Postcard | 10.0 × 15.0 cm (4×6 in) | 1181 × 1772 px | NEET Postcard Photo |
| A4 Document Sheet | 21.0 × 29.7 cm | 2480 × 3508 px | Document print & scan standard |
Why In-Browser Processing is Essential for Sensitive Photos & IDs
🔒 Zero Cloud Uploads
Signatures, Aadhaar IDs, and passport photos are sensitive personal biometric assets. PixelKit processes all operations locally in browser RAM.
⚡ Sub-Second Quantization
Powered by WebAssembly and Canvas binary-search encoding, resizing and compressing takes under 200ms with zero server latency.
🎯 Portal Pass Guarantee
Dimensions, aspect ratios, and KB file limits are locked directly to the official government guidelines for immediate intake clearance.