Pixels per inch to Pixels per centimeter Converter
Quick answer: To convert pixels per inch to pixels per centimeter, multiply by 0.3937008. For example, 10 ppi is 3.937008 px/cm. One pixel per inch equals 0.3937008 px/cm.
- Calculator
- Formula
- Examples
- Size compared
- About the units
- Step by step
- Popular conversions
- Reading your result
- Mistakes
- FAQ
- Related tools
- Method
Use the Pixels per inch to Pixels per centimeter Converter
Pixels per inch to Pixels per centimeter formula and what each symbol means
px/cm = ppi × 0.3937008
| Symbol | Meaning |
|---|---|
| ppi | Pixel per inch |
| px/cm | Pixel per centimeter |
Pixels per inch to Pixels per centimeter examples
1 ppi
1 ppi × 0.3937008 = 0.3937008 px/cm.
10 ppi
10 ppi × 0.3937008 = 3.937008 px/cm.
100 ppi
100 ppi × 0.3937008 = 39.37008 px/cm.
Pixels per inch compared with Pixels per centimeter
One px/cm is 2.54 times as large as one ppi, so your number gets smaller when you convert pixels per inch to pixels per centimeter and bigger when you convert back. If the answer is not smaller than what you typed, you multiplied instead of dividing.
About pixels per inch and pixels per centimeter
Pixel per inch (ppi): Pixels per inch. Pixel per centimeter (px/cm): Pixels per centimetre, 2.54 ppi.
How to calculate Pixels per inch to Pixels per centimeter step by step
- Enter the value in ppi (the starting unit).
- Multiply by 0.3937008, because 1 ppi = 0.3937008 px/cm.
- The product is the value in px/cm. To go back, divide by 0.3937008 or multiply by 2.54.
Popular digital image resolution conversions
How to read your Pixels per inch to Pixels per centimeter result
Quick estimate: multiply by about 0.4 to get pixels per centimeter from pixels per inch; this is within 1.6% of the exact factor. One pixel per centimetre equals 2.54 ppi, and one pixel per millimetre equals 25.4 ppi.
| PIXELS PER INCH | PIXELS PER CENTIMETER |
|---|---|
| 1 | 0.3937008 |
| 2 | 0.7874016 |
| 5 | 1.968504 |
| 10 | 3.937008 |
| 20 | 7.874016 |
| 50 | 19.68504 |
| 100 | 39.37008 |
| 1,000 | 393.7008 |
Pixels per centimeter to Pixels per inch: quick table
| PIXELS PER CENTIMETER | PIXELS PER INCH |
|---|---|
| 1 | 2.54 |
| 5 | 12.7 |
| 10 | 25.4 |
| 25 | 63.5 |
| 50 | 127 |
| 100 | 254 |
| 250 | 635 |
| 500 | 1,270 |
Common mistakes when calculating Pixels per inch to Pixels per centimeter
- Mixing px/cm and px/mm, which differ by 10.
- Dividing when you should multiply: from ppi to px/cm multiply by 0.3937008; from px/cm to ppi divide by 0.3937008.
Pixels per inch to Pixels per centimeter FAQ
How many px/cm are in 1 ppi?
1 ppi equals 0.3937008 px/cm.
How many ppi are in 1 px/cm?
1 px/cm equals 2.54 ppi.
Is 1 ppi = 0.3937008 px/cm an exact conversion?
The factor is shown rounded to 7 significant figures (0.3937008). The calculator above uses more digits.
What is a pixel per centimeter (px/cm)?
Pixels per centimetre, 2.54 ppi.
How can I estimate pixels per inch to pixels per centimeter in my head?
Quick estimate: multiply by about 0.4 to get pixels per centimeter from pixels per inch; this is within 1.6% of the exact factor.
What is 150 ppi in pixels per centimeter?
150 ppi = 59.05512 px/cm (since 150 × 0.3937008).
What is 0.5 ppi in pixels per centimeter?
0.5 ppi = 0.1968504 px/cm (since 0.5 × 0.3937008).
What is 25 ppi in pixels per centimeter?
25 ppi = 9.84252 px/cm (since 25 × 0.3937008).
How many decimals should I keep when converting ppi to px/cm?
Match the precision of your original measurement. For example, 3.937008 px/cm rounds to 3.94 px/cm at 3 significant figures; keep more digits only for engineering or scientific work.
Method, review and disclaimer
Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: NIST SP 811, Appendix B.8: conversion factors, BIPM: the International System of Units (SI)