CM ↔ Pixels Calculator
Instantly convert centimeters to pixels (and vice versa) for exam photos, signatures, and print design. Supports standard 200 DPI and 300 DPI.
For most Indian government exams (SSC, IBPS, UPSC), 200 or 300 DPI is required.
Common Exam Sizes
Pixels = (cm × DPI) ÷ 2.54Common Exam Conversions
At 300 DPI (High Quality)
| Centimeters (cm) | Pixels (px) |
|---|---|
| 1.5 cm | 177 px |
| 3.0 cm | 354 px |
| 3.5 cm | 413 px |
| 4.5 cm | 531 px |
At 200 DPI (Standard)
| Centimeters (cm) | Pixels (px) |
|---|---|
| 1.5 cm | 118 px |
| 3.0 cm | 236 px |
| 3.5 cm | 276 px |
| 4.5 cm | 354 px |
Frequently Asked Questions
How many pixels are in 1 cm?
It depends on the resolution (DPI). At 300 DPI, 1 cm equals 118 pixels. At 200 DPI, 1 cm is 79 pixels. At standard screen resolution (96 DPI), 1 cm is 38 pixels.
What is 3.5 cm x 4.5 cm in pixels?
At 300 DPI (standard for printing and most exam forms), 3.5 cm x 4.5 cm is exactly 413 x 531 pixels. At 200 DPI, it is 276 x 354 pixels.
What is the formula to convert cm to pixels?
The formula is: Pixels = (Centimeters x DPI) ÷ 2.54. Because 1 inch is exactly 2.54 centimeters, you first convert cm to inches, then multiply by DPI (Dots Per Inch).
Which DPI should I use for government exams?
Most Indian government portals (SSC, IBPS, UPSC) recommend scanning photos and signatures at 200 DPI or 300 DPI. If the notification does not specify, use 300 DPI for the best quality.