Digital Image Resolution / px/cm → ppi
Convert Pixels per centimeter to Pixels per inch
Convert linear pixel density between pixels per inch and per metric distance. Convert Pixels per centimeter (px/cm) to Pixels per inch (ppi). Find the formula, worked examples, unit definitions, and practical guidance below.
Reverse: Pixels per inch to Pixels per centimeter →
How to convert pixels per centimeter to pixels per inch
Pixel density relates pixel counts to physical length. Printer dots (DPI) are not necessarily image pixels (PPI); resolution alone cannot determine image dimensions without a pixel count. This tool does not resize images.
Use x for the value in px/cm, b for the intermediate value in px/m, and y for the result in ppi.
ppi = px/cm × 100 ÷ 39.37007874015748
Worked examples
10 px/cm ≈ 25.4 ppi
Step 1: (10 × 100) ≈ 1000 px/m.
Step 2: 1000 ÷ 39.3700787402 ≈ 25.4 ppi.20 px/cm ≈ 50.8 ppi
Step 1: (20 × 100) ≈ 2000 px/m.
Step 2: 2000 ÷ 39.3700787402 ≈ 50.8 ppi.
Results are rounded to 12 significant digits. Converting units does not increase the precision of the original measurement. Very large or small values outside JavaScript’s finite numeric range are rejected.
About Pixels per centimeter
Pixels per centimeter (px/cm) measures digital image resolution under the conventions above. The base value in px/m is (x × 100), where x is the numerical value in px/cm. Factors shown here are rounded for display; calculations use the stored factor.
About Pixels per inch
Pixels per inch (ppi) measures digital image resolution under the conventions above. The base value in px/m is (x × 39.3700787402), where x is the numerical value in ppi. Factors shown here are rounded for display; calculations use the stored factor.
Definitions and sources
For a different quantity or formatting task, see the related other conversion tools.
Pixels per centimeter to pixels per inch reference table
| Pixels per centimeter (px/cm) | Pixels per inch (ppi) |
|---|---|
| 1 | 2.54 |
| 5 | 12.7 |
| 10 | 25.4 |
| 25 | 63.5 |
| 50 | 127 |
| 100 | 254 |
| 1000 | 2540 |
Browse every digital image resolution conversion →