Here are the types of HDMI cables: Standard HDMI Cable: These cables are designed for common HDTV broadcast, cable, and satellite TV resolutions (up to 720p and 1080i) with a bandwidth capacity of up to 5 Gbps. It is optimized for HDMI versions 1.0 to 1.2a. Standard Automotive HDMI Cable: This cable type has the same capabilities as a standard

According to Dell, the maximum recommended cable length to ensure optimal performance is 1.8 meters (6 feet). Using anything beyond that increases the chances of the risks mentioned previously. However, it is still possible to use longer DisplayPorts without being affected by those risks. If for some reason you need to use a long DisplayPort

No maximum cable length in the HDMI standard, but according to wikipedia, lengths up to 16 feet should be no problem. That stuff can hit 30 meters over STP Cat6.
With the help of a package of set-top boxes and media players and a large 4K display, we are able to construct a home theater. However, there is a drawback: if the HDMI cable is stretched too far, data quality suffers. Fortunately, the HDMI cable may be extended by an HDMI extender up to 1000 feet (the maximum length of an HDMI cable is 50 feet).
Length, Attenuation, Wiremap and Near End Crosstalk (NEXT). The length requirements defined that the maximum length a cable could be run from a Telecommunications Room to a work area outlet in a commercial building could not exceed 90 meters (295 feet). This 90 meter distance is defined as the horizontal link.
Cable Length: 20M / 65.6ft: Cable Type: Hybrid type with optical fiber (OM3) and copper wire: Video Input: Interfaces: 1 x HDMI 19-pin Type-A Male: Video Output: Interfaces: 1 x HDMI 19-pin Type-A Male: Video: Max. Data Rate: 18 Gbps (6 Gbps per Channel) Max. Pixel Clock: 600 MHz (Max.) Max. Resolutions / Distance: Up to 4096 x 2160 / 3840 x A8TgZ2s. 485 995 408 56 794 318 805 568

hdmi cable max length in meters