Measuring HDMI Video Latency
This page describes how to measure HDMI video latency with a Leo Bodnar video signal lag tester.
⚠️ The Leo Boardnar Lag Testers are designed to report a display’s input lag when measuring at the center of the screen. Follow these steps to measure video latency instead:
Steps
- Record the reported lag value at the center of the middle white block.
- Use the following table to calculate the video latency based on the value recorded in step 1:
| Refresh Rate | Calculation |
|---|---|
| 24 Hz | subtract 20.0 ms from middle measurement |
| 25 Hz | subtract 19.2 ms from middle measurement |
| 30 Hz | subtract 16.4 ms from middle measurement |
| 50 Hz | subtract 9.6 ms from middle measurement |
| 60 Hz | subtract 8.0 ms from middle measurement |
If you’re using the 4K tester, you can also update the firmware to the latest version provided by Leo Bodnar.
Last updated on July 14th, 2022.