Monitor Motion Response
Monitor Response Time Test – Check Pixel Response Online
Visually test your monitor's pixel response with adjustable moving patterns. Compare light-to-dark, dark-to-light and mid-tone transitions while checking for trailing, smearing and overdrive overshoot.
Monitor Pixel Response Test
This visual tool moves high-contrast patterns across the screen at adjustable speeds. It is designed to help you compare pixel-transition behaviour without falsely claiming a laboratory grey-to-grey measurement.
- Motion speed
- Adjustable from 180 to 1800 pixels per second.
- Transitions
- Compare light-to-dark, dark-to-light and mid-tone motion.
- Backgrounds
- Light, mid-grey and dark backgrounds expose different behaviour.
- Patterns
- Use a block, bars or checker pattern.
- Browser FPS
- Estimated animation timing helps identify frame-pacing limitations.
- Fullscreen
- Provides more travel distance for visual inspection.
How to Test Monitor Response Time
- Set the display to its native resolution and intended refresh rate.
- Start with the default 840 pixels-per-second motion speed.
- Follow the moving target with your eyes.
- Look for long trails, smearing or bright and dark halos.
- Switch between light-to-dark, dark-to-light and mid-tone transitions.
- Repeat on light, grey and dark backgrounds.
- Compare monitor overdrive settings using the same pattern.
What Monitor Response Time Means
Monitor response time describes how quickly pixels change from one value to another. Real displays can have very different transition speeds for different colour or brightness pairs, so a single quoted number does not describe every transition.
GtG, MPRT, Ghosting and Overshoot
Grey-to-Grey (GtG)
Pixel transition time between grey levels under a defined measurement method.
MPRT
Motion-picture persistence measurement, not the same as a single GtG transition.
Ghosting
Visible trailing caused by transitions that do not settle quickly enough.
Dark Smearing
Long dark trails that can appear during slower dark pixel transitions.
Overshoot
Pixels go beyond the intended value before settling, often because overdrive is too aggressive.
Refresh Rate
How frequently new frames are presented, separate from pixel transition speed.
How to Read the Response Time Test
| What you see | Possible cause | What to try |
|---|---|---|
| Short, soft trail | Normal persistence or modest transition lag | Compare another speed and refresh rate. |
| Long dark smear | Slow dark pixel transition | Try another overdrive setting and compare dark backgrounds. |
| Bright halo around motion | Pixel overshoot or inverse ghosting | Reduce monitor overdrive. |
| Object skips or jumps | Browser or system frame pacing issue | Close heavy apps and confirm browser FPS. |
| Different result by transition | Panel response varies by colour pair | Choose the overdrive level with the best overall balance. |
Response Time vs Refresh Rate
Refresh rate describes how often a new frame can be presented. Response time describes how quickly the physical pixels change toward the next value. A high-refresh monitor can still have slow transitions.
Response Time vs Monitor Ghosting
Slow pixel transitions often create visible ghosting, but ghosting is a visual symptom rather than the numerical response-time measurement itself. Use the dedicated Monitor Ghosting Test when the primary goal is to inspect trails and smearing.
Why a Browser Cannot Measure True GtG Milliseconds
A webpage has no luminance sensor observing the monitor panel. It can generate controlled patterns, but it cannot directly measure the physical pixel reaching a defined brightness threshold. True response-time testing requires external measurement equipment and a defined methodology.
Monitor Response Time Troubleshooting
- Check refresh rate. Confirm the operating system or console is using the intended display mode.
- Compare overdrive levels. The fastest named setting can create more overshoot than a moderate setting.
- Test multiple transitions. Some panels handle bright transitions well but struggle with darker ones.
- Check browser timing. Close heavy tabs and apps if browser FPS is unstable.
Monitor Response Time Test Frequently Asked Questions
What is a monitor response time test?
A monitor response time test uses moving high-contrast patterns to help you visually inspect how quickly pixels appear to transition between colours or brightness levels.
Can this test measure my monitor response time in milliseconds?
Not accurately. A normal webpage cannot directly measure physical pixel transition time in the same way laboratory equipment can, so this tool is a visual response-time test rather than a certified millisecond measurement.
What is grey-to-grey response time?
Grey-to-grey, or GtG, describes how quickly a pixel changes from one grey level to another. Manufacturers usually quote a best-case or specified transition measured under controlled conditions.
What is MPRT?
Motion Picture Response Time describes perceived display persistence during motion. It is not the same thing as a single grey-to-grey pixel transition and depends on the display and measurement method.
How does this response time test work?
The page moves high-contrast blocks, bars or checker patterns across the screen at adjustable speeds so you can compare transition clarity, trailing, smearing and overshoot.
What speed should I use?
Start around 720 to 960 pixels per second, then compare slower and faster motion. Different speeds can reveal different transition weaknesses.
Why should I test different backgrounds?
Pixel transitions can behave differently depending on the starting and ending brightness. Dark-to-light and light-to-dark transitions can expose different response-time behaviour.
What does a slow response time look like?
Slow transitions often appear as visible trailing, smearing or a soft duplicate-like image behind moving content.
What is inverse ghosting?
Inverse ghosting is a bright or dark halo caused by aggressive overdrive pushing pixels beyond the intended target before they settle.
Does a higher refresh rate mean faster response time?
No. Refresh rate is how often the display receives a new frame, while response time describes pixel transition behaviour. They influence motion clarity differently.
Can a 144 Hz monitor still have slow response time?
Yes. A high-refresh display can still show visible transition trails if some pixel changes are slow or poorly tuned.
Can a 240 Hz monitor have ghosting?
Yes. High refresh rate does not eliminate slow pixel transitions or overdrive overshoot.
What is monitor overdrive?
Overdrive is a display setting that drives pixels more aggressively toward the next value. It can reduce slow transitions, but excessive overdrive can create overshoot or inverse ghosting.
Which overdrive setting should I use?
Use the setting that gives the clearest motion with the least trailing and the least visible overshoot. The fastest named setting is not always the best.
Why does browser FPS matter?
If the browser cannot animate close to the display refresh rate, the moving object can stutter or skip, which makes visual response-time evaluation less reliable.
Should I use fullscreen mode?
Fullscreen gives the moving pattern more travel distance and removes distractions, which can make trailing and overshoot easier to inspect.
Is this the same as a monitor ghosting test?
They overlap, but this page focuses on visual pixel-transition behaviour and response-time concepts, while the dedicated Monitor Ghosting Test focuses more directly on trailing, smearing and inverse ghosting.
How can I get a true response-time measurement?
True pixel response-time measurements require external high-speed sensors or cameras, controlled colour transitions and a defined measurement method.