4K
An image resolution of 3840 pixels wide by 2160 pixels high. In terms of video capture, content, and display, it is also known as Ultra HD (UHD).
It is named for the nearly 4,000 pixels in the width dimension. (Earlier formats such as 1080p and 720p measured the pixel height instead.)
See: 1080p
Compared to 1080p HD, 4K has about twice the resolution in each dimension, for four times the total pixels (8 megapixel, compared to 2 megapixels for 1080p.)
The next major step above 4K is 8K, which is nearly 8,000 pixels wide.
Last updated Feb 7, 2017 by Rich Brome
Editor in Chief Rich became fascinated with cell phones in 1999, creating mobile web sites for phones with tiny black-and-white displays and obsessing over new phone models. Realizing a need for better info about phones, he started Phone Scoop in 2001, and has been helming the site ever since. Rich has spent two decades researching and covering every detail of the phone industry, traveling the world to tour factories, interview CEOs, and get every last spec and photo Phone Scoop readers have come to expect. As an industry veteran, Rich is a respected voice on phone technology of the past, present, and future.
