Pixels (CSS) to Inches (px to in)
1 pixel (CSS) equals 0.01041666667 inches (rounded).
How to convert pixels (CSS) to inches
To convert pixels (CSS) to inches, multiply the number of pixels (CSS) by 0.01041666667. The factor is rounded to 10 significant digits. To go the other way, multiply inches by 96.
inches = pixels (CSS) × 0.01041666667
Example: 10 pixels (CSS) = 0.1041666667 inches.
About these units
Pixel (CSS) (px)
The CSS reference pixel, defined as 1/96 of an inch. Physical screens vary, but browsers use this value to convert pixels to print units.
Pixel is a contraction of picture element, itself built from pix, a 1930s shortening of pictures. The idea is older than the word: Paul Nipkow's 1888 German patent spoke of a Bildpunkt, or picture point, and the phrase picture element appears in US patents filed as early as 1911. Frederic C. Billingsley of the Jet Propulsion Laboratory published pixel in 1965, writing about scanned images from space probes to the Moon and Mars, and said he had learned it from Keith E. McFarland, who reported it was already in use around 1963.
A pixel in a photograph is a sample, not a fixed length, and screens vary widely in size. CSS therefore defines px as an abstract reference pixel of exactly 1/96 inch, based on the visual angle of one pixel on a 96 dpi device held at arm's length. The CSS specification gives that angle as about 0.0213 degrees for a nominal arm's length of 28 inches, which works out to about 0.26 mm. On sharper screens a single CSS pixel spans several device pixels. Earlier CSS versions did not fix the ratio, but too much existing content assumed 96 dpi.
1 pixel (CSS) = 0.0002645833333 meters (approximately).
Sources: W3C: CSS Values and Units Module Level 3, absolute lengths; Wikipedia: Pixel
Inch (in)
1/12 of a foot. Defined as exactly 25.4 millimeters since 1959, when the US and Commonwealth countries agreed a common international inch.
Latin uncia, meaning one-twelfth, is the root of both inch and ounce, and it passed into Old English as ynce. Roman measurers divided their foot into twelve unciae, and the English inch kept that twelfth. After 1066 an inch was reckoned as three barleycorns, and a 1324 statute attributed to Edward II spelled out the definition as three grains of barley, dry and round, placed end to end lengthwise. For centuries the inch was simply a twelfth of a foot, or a thirty-sixth of a yard, and the US and UK each kept their own copy of the standard yard.
Those copies differed slightly until the 1959 international agreement fixed the yard at exactly 0.9144 meter, which made the inch exactly 25.4 millimeters. The US adopted it in 1959 and the UK ratified it in 1963, effective 1964. Today the inch is still the customary unit in the United States and Canada, and the UK keeps it on road signs. Worldwide it also names display diagonals, wheel rims, tire codes and pipe sizes.
1 inch = 0.0254 meters (exactly).
Sources: Wikipedia: Inch; Wikipedia: Yard; NIST Guide to the SI, Appendix B.8: conversion factors
Related conversions
- Inches to pixels (CSS) (reverse)
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- Pixels (CSS) to kilometers
- Pixels (CSS) to centimeters
- Pixels (CSS) to millimeters
- Pixels (CSS) to feet
- Pixels (CSS) to yards
- Pixels (CSS) to miles
- Pixels (CSS) to micrometers
- Pixels (CSS) to nanometers
- Pixels (CSS) to nautical miles
- Pixels (CSS) to light-years
- Meters to inches
- Kilometers to inches
- Centimeters to inches
- Millimeters to inches
- Feet to inches
- Yards to inches
- Miles to inches
- Micrometers to inches
- Nanometers to inches
- Nautical miles to inches
- Light-years to inches
- Picometers to inches
See all length units.