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The Right Conduit Size For An HDMI Cable? A Complete Guide

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Ever wondered how the HDMI cables were designed and what the right conduit size should be? There are many different HDMI cables available, but only one is the correct size for your device. To ensure you find the right conduit size, follow our guide.

Size 1-1/4 and above is the best conduit size for an HDMI cable. The typical conduit size for an HDMI cable is between size 3/4 and 1-1/4 if no other cables are flowing through it. However, given that the widest end of the HDMI (type B) cord is 0.84″, size 1-1/4 will work for all HDMI types.

In this guide, we’ll go over what size of HDMI cable you will need for your device. Before you plan to install the HDMI cables, you have to first consider what should be the conduit size for the cables. If HDMI cables are installed in the wrong conduit size from the beginning, a lot of problems can arise. Let’s get started.

How To Choose The Right Conduit Size For An HDMI Cable

A conduit is a hollow pipe that carries electricity and data cables through your home. They come in different sizes, and it is important to choose the right one for each job. 

When choosing the size of the conduit for your HDMI cables, it’s important to remember that there is no conduit specifically designed for HDMI cables. You will need to choose a conduit size manually when installing an HDMI cable. Their sizes are measured by the inner diameter, and you will need to carefully measure your conduit before choosing one.


Choosing a conduit is a crucial step in installing an HDMI cable. If there is no ample space to install the conduit, it will make the installation process difficult and potentially hazardous to anyone working on the system. 

Steps To Choosing the Right Conduit Size For An HDMI Cable:

In order to choose the right conduit size for your HDMI cable, you must take into account several factors. The first is how much space you have to work with, because a big hole was just made in your wall or ceiling. You also need to take into consideration if you’re just running an HDMI cable through the conduit or if the conduit needs to accommodate other cables as well.

Choosing the right conduit size for HDMI cable is easy. You can use either a flexible plastic conduit or one with a metal foundation.

Step 1: Calculate the Distance of Your Run.

Find out the maximum distance your HDMI cable will have to travel. This way you can determine the length of your conduit.

Step 2: Measure the Width of Your HDMI cable.

You can either measure the width of your HDMI cable or check out our table below. HDMI cables come in different types that differ in size.

Step 3: Determine The Diameter Of The Conduit: 

As a general rule, conduits size 3/4 to 1-1/4 work fine for single HDMI cables. Conduit sizes in the US vary from manufacturer to manufacturer. Trade size 3/4 to 1-1/4 typically have inner diameters of around 0.83″ to 1.39″.

Step 4: Calculate The Overall Diameter:

When inserting wires of various gauges and types within the conduit, determine the diameter of the conduit by calculating the overall diameter of the wires.

Step 5: Route the Cable Via a Conduit.

An excessively long HDMI cable won’t function properly; it may result in signal loss, which can cause a flickering or nonexistent image. Also, be careful not to jam too many cables together in one location since this will impede the signal’s ability to pass through the cable.

What Size of Conduit Will HDMI Cable Fit Through?

Conduits’ diameters are not standardized, as was previously mentioned. So, depending on a variety of factors, you may decide to run your HDMI cable through a conduit that you think is suitable. 

Whatever the size of your home, you must have enough space to expand if necessary in the future.

Use our size chart below to identify the right conduit size for an HDMI cable.


HDMI Connector Types





Type A

Supports all SDTV, EDTV, and HDTV modes.

HDMI 1.0 specification

The plug's outside dimensions are 13.9 mm (0.55″) wide by 4.45 mm (0.18″) high.

19 pins with bandwidth to support all SDTV, EDTV, and HDTV modes.

Type B

Type B is electrically compatible with dual link DVI-D and is not used in any CE products.

HDMI 1.0 specification

21.2 mm × 4.45 mm (0.84″ x 0.18″)

29 pins (21.2 mm by 4.45 mm) and can carry double the video bandwidth of Type A

Type C

Portable devices

HDMI 1.3 specification

It is smaller than the Type A connector (10.42 mm by 2.42 mm) (0.41″ by 0.1″)

19 pin configuration.

Type D

Small portable devices & mobile phones

HDMI Version 1.4.

6.4 mm × 2.8 mm (0.25″ x 0.11″)

19 pin configuration.

Type E

Automotive Applications

HDMI Version 1.4b

Depth: 24.35 mm (0.96″) × Height: 12.50 mm (0.49″) × Width: 24.50 mm (0.96″)

HDMI Type E Connector is designed for High Speed Data Transmission

Source: Electronics notes

Frequently Asked Questions (FAQs)

Here are some of the most commonly asked questions that we get about the right conduit size for an HDMI Cable.

Q.1. How do I get HDMI through conduit?

A. Before purchasing an HDMI cable, you must first determine what size of conduit to use to run it. Using a Glass fiber fish tape is the ideal method for feeding your cord through the conduit. First, insert only the fish tape and pull it out the other end. Connect the HDMI cable end with fish tape. Cover with tape.

Q. 2. Does the HDMI cable need to be shielded?

A. Yes, shielding is required for the cable. It is typically wrapped around the cables and wires inside the cable. The audio and video signals being transmitted requires it. The RF and electrostatic waves around it would interfere with the signal if it weren’t shielded.

Final Thoughts

Hopefully, now that you are aware of what to consider when choosing the conduit’s size, the installation process will be seamless. The right conduit will make sure to eliminate most, if not all problems caused by overlapping and/or wrong fits.

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