How to Extend an HDMI Cable

by David Lipscomb

High Definition Multimedia Interface, or HDMI, cables offer a one-wire solution for high-quality audio and video. Although you typically only need one cable per component, there are occasions where that cable is too short. This can happen if you replace a television with a projector, change your equipment rack's location or install a new component. Extending an HDMI cable is relatively straightforward, but you need to keep in mind the wire's length prior to installation.

Measure the distance between the end of your existing cable and its destination device. Ensure your measurement involves the actual path the cable will take, including any bends or curves.

Slide the end of the existing cable into one side of the coupler. Slip one end of the new HDMI cable into the other end. Slide the remaining free end into the receiving component.

Plug in an HDMI repeater if the total cable length exceeds 50 feet. Set the extender next to or on top of your projector, receiver or television. Insert the cable leading from the component into the "IN" on the extender. Slide a short cable from the "OUT" on the extender to the receiving component. Plug the power adapter into a nearby AC outlet.


  • Kits are available that let your use Ethernet cables to extend HDMI runs. A small adapter converts the HDMI signal at the source component, carries it over Ethernet and back out to HDMI at the receiving end.
  • Longer HDMI cables sometimes place a repeater inline on the cable itself, using the 5 volts present on the line to power the repeater.
  • Move your equipment around on your rack to see if a new configuration solves your cable length problem.


  • Remember that excessively long HDMI cables without repeaters often cause dropouts or intermittent performance.

Items you will need

  • Tape measure
  • HDMI cable
  • HDMI coupler
  • HDMI repeater

About the Author

David Lipscomb is a professional writer and public relations practitioner. Lipscomb brings more than a decade of experience in the consumer electronics and advertising industries. Lipscomb holds a degree in public relations from Webster University.

Photo Credits

  • Ethan Miller/Getty Images News/Getty Images