Pixel ↔ CM Calculator
Convert between pixels, centimeters, and inches at any DPI resolution. Includes common exam photo size presets for SSC, UPSC, and IBPS.
Result in CM
5.08
CMPrint documents use 300 DPI. Screen images use 72–96 DPI.
Common Exam Photo Sizes
Passport Photo
3.5 × 4.5 cm
276 × 354 px @ 200 DPI
SSC CGL Photo
3.5 × 4.5 cm
276 × 354 px @ 200 DPI
UPSC Photo
3.5 × 4.5 cm
276 × 354 px @ 200 DPI
IBPS Signature
2 × 7 cm
157 × 551 px @ 200 DPI
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Frequently Asked Questions
How to use Pixel ↔ CM Calculator
- 1
Enter your details
Open Pixel ↔ CM Calculator and type your values into the fields. Convert pixels to CM, inches, and back at any DPI. Common exam photo sizes included.
- 2
See the result instantly
The result updates automatically as you type — no button to press. All calculations run locally in your browser; nothing is sent to a server.
- 3
Adjust or copy
Change any input to recalculate immediately, then copy or note the result.
How to Convert Pixels to CM
The formula to convert pixels to centimeters depends on the DPI (Dots Per Inch) resolution:
CM = (Pixels ÷ DPI) × 2.54
For example, a 600 × 600 pixel image at 200 DPI = 7.62 cm × 7.62 cm.
What DPI Should I Use?
- 72–96 DPI: Screen / website images (low resolution)
- 150 DPI: Standard print quality
- 200 DPI: Most government exam portals specify this
- 300 DPI: Professional photo printing
- 600 DPI: High-quality scanning and archival