Digital Image Resolution Converter
Convert between 5 image resolution units instantly. Enter a value, pick your units and get the result with the formula, a full conversion table and worked examples.
300 dpi in all image resolution units
Updates live as you type. Click a row to set it as the target unit.
| Unit | Symbol | Value |
|---|---|---|
| Dot per metre | dot/m | 11,811 |
| Dot per inch | dpi | 300 |
| Pixel per inch | ppi | 300 |
| Dot per centimetre | dot/cm | 118.11 |
| Dot per millimetre | dot/mm | 11.811 |
How to Convert Image Resolution Units
Digital image resolution is the number of dots or pixels per unit length on a printed page or screen. Printers and scanners usually quote dots per inch (dpi); 300 dpi is about 118 dots per centimetre.
Every unit on this page is stored as a fixed factor relative to one reference unit, the dot per metre (dot/m). Converting is a two step multiply and divide:
- Multiply your value by the factor of the source unit to get the value in dot/m.
- Divide that result by the factor of the target unit.
Dot per inch to Dot per centimetre conversion table
| Dot per inch (dpi) | Dot per centimetre (dot/cm) |
|---|---|
| 1 dpi | 0.393701 dot/cm |
| 2 dpi | 0.787402 dot/cm |
| 3 dpi | 1.1811 dot/cm |
| 4 dpi | 1.5748 dot/cm |
| 5 dpi | 1.9685 dot/cm |
| 6 dpi | 2.3622 dot/cm |
| 7 dpi | 2.75591 dot/cm |
| 8 dpi | 3.14961 dot/cm |
| 9 dpi | 3.54331 dot/cm |
| 10 dpi | 3.93701 dot/cm |
| 15 dpi | 5.90551 dot/cm |
| 20 dpi | 7.87402 dot/cm |
| 25 dpi | 9.84252 dot/cm |
| 30 dpi | 11.811 dot/cm |
| 40 dpi | 15.748 dot/cm |
| 50 dpi | 19.685 dot/cm |
| 75 dpi | 29.5276 dot/cm |
| 100 dpi | 39.3701 dot/cm |
| 250 dpi | 98.4252 dot/cm |
| 500 dpi | 196.85 dot/cm |
| 1,000 dpi | 393.701 dot/cm |
Image Resolution Units and Conversion Factors
Value of one unit expressed in dot/m.
| Unit | Symbol | In dot/m |
|---|---|---|
| Dot per metre | dot/m | 1 |
| Dot per inch | dpi | 39.37007874 |
| Pixel per inch | ppi | 39.37007874 |
| Dot per centimetre | dot/cm | 100 |
| Dot per millimetre | dot/mm | 1,000 |
Frequently Asked Questions
How do I convert dpi to dot/cm?
To convert dot per inch (dpi) to dot per centimetre (dot/cm), multiply the value in dpi by 0.393701. For example, 1 dpi = 0.393701 dot/cm.
How do I convert dot/cm to dpi?
To convert dot per centimetre (dot/cm) to dot per inch (dpi), multiply the value in dot/cm by 2.54. For example, 1 dot/cm = 2.54 dpi.
How do I convert dpi to dot/mm?
To convert dot per inch (dpi) to dot per millimetre (dot/mm), multiply the value in dpi by 0.0393701. For example, 1 dpi = 0.0393701 dot/mm.
Can I see a value in every image resolution unit at once?
Yes. Enter a value and choose the source unit; the "all units" table below the converter instantly lists the equivalent in all 5 supported units. Click any row to make it the target unit.
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