Is 4k video resolution the same as 2160p?

Here’s a question we get a lot about 4k resolution. Is 2160p the same as 4k?

The answer is, yes! When referring to 3840 x 2160 resolution for home theater the industry standard is to just say “4k.” This also goes for the cinematic standard and digital television (DTV) standards. Although the resolutions may vary slightly, 4k refers to a horizontal resolution of about 4000 pixels.

Ultra HD TVs and Ultra HD Blu-ray discs have a resolution of 3840 x 2160, while digital projectors are slightly wider at 4096 x 2160.

Also Read:
What is 4k Ultra HD TV?
What is 4k resolution?
What is HDR?