HDMI Cable Length Calculator
Find the right HDMI cable type for your run length, version, and feature requirements.
Cable Type Needed
Active
Built-in signal booster — directional, source to display
Max Bandwidth
48 Gbps
HDMI 2.1
Max Resolution
4K/120Hz
Also 8K/60Hz
Your 15ft Run with HDMI 2.1
Installation Tip
Active cables are directional. The “Source” end connects to your player/console, the “Display” end to your TV/projector. Label both ends before pulling in-wall.
HDMI Version Comparison
Your selected version is highlighted
| Spec | HDMI 1.4 | HDMI 2.0 | HDMI 2.1 |
|---|---|---|---|
| Bandwidth | 10.2 Gbps | 18 Gbps | 48 Gbps |
| Passive Max | 50ft | 25ft | 10ft |
| Active Max | 75ft | 50ft | 25ft |
| eARC | |||
| VRR |
Cable Type Guide
Understanding the three HDMI cable technologies
Passive HDMI
Standard copper cable. Simplest and most affordable. Works for short runs within passive range. Not directional.
- Lowest cost
- Bi-directional
- Limited length
Active HDMI
Copper with built-in signal booster. Extends range beyond passive. Powered by HDMI 5V rail. Directional.
- Extended range
- Directional
- Moderate cost
Fiber Optic HDMI
Signal transmitted as light over fiber. No distance limit for practical AV. Thin, light, EMI immune.
- 100ft+ runs
- EMI immune
- Fragile bends
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Find an InstallerHDMI Cable Length Limits for Professional AV Installation
Choosing the right HDMI cable means understanding the relationship between cable length, HDMI version, and cable technology. A standard passive copper cable works for short runs, but signal degradation increases with distance, causing sparkles, dropouts, or complete picture loss.
Passive cables use standard copper with no active electronics. For HDMI 2.1 at 48 Gbps, passive works up to about 10 feet. Active cables include a built-in signal booster, extending to ~25 feet for 2.1. Fiber optic converts to light, enabling 100+ foot runs with zero signal loss.
Always add 10–20% extra length for slack and routing. Use certified cables — look for "Ultra High Speed" for HDMI 2.1. Pair with our Speaker Wire Gauge Calculator for audio runs and our Conduit Fill Calculator for conduit sizing.
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