How to Use the Monitor Real-Time Refresh Rate (Hz) & FPS Frame Tester
-
1
Open this tool on the monitor you wish to benchmark.
-
2
Ensure browser hardware acceleration is enabled for maximum GPU synchronization.
-
3
The tool calculates delta frame times across hundreds of consecutive `requestAnimationFrame` intervals.
-
4
Inspect your calculated hardware Display Refresh Rate (e.g. 144 Hz, 240 Hz), instant FPS, and frame time stability graph.
-
5
Detect frame drops, micro-stutters, and monitor overclock stability.
Practical Example & Use Case
Common Real-World Scenario
Confirming that a newly connected gaming monitor is properly configured to 165Hz in Windows Display Settings rather than stuck at the default 60Hz.
Technical Notes & Limitations
Browser Engine Architecture
Requires browser hardware acceleration and VSync synchronization to measure full display panel refresh rate.
Frequently Asked Questions
Why does my 144Hz monitor show 60Hz in tests?
Windows often defaults new monitors to 60Hz. Open Windows Settings > Display > Advanced Display and change the Refresh Rate dropdown to 144Hz.
What is Frame Time in gaming?
Frame time is the duration in milliseconds required to render a single frame. At 60Hz each frame takes 16.67ms, while at 144Hz each frame takes only 6.94ms.