ElixerPro.tools
Tier B - Browser Estimate Ready

Screen Refresh Rate (Hz) Estimator

Estimate monitor refresh rate (60Hz, 120Hz, 144Hz, 240Hz) via frame timing analysis. Samples consecutive requestAnimationFrame callbacks across 300+ frames to estimate display vertical synchronization frequency in Hertz (Hz).

Screen Refresh Rate (Hz) Estimator

Sampling...
Sample Progress (300 frames) 0%
Estimated Refresh Rate:
-- Hz
Average Frame Interval:
-- ms
Timing Jitter (Std Dev):
-- ms

How to use this test

  1. Click 'Start Refresh Rate Test'.
  2. Ensure browser window is active in foreground.
  3. Wait 3-5 seconds while 300 animation frames are sampled.
  4. Review estimated refresh rate (e.g. 60Hz, 144Hz) and variance histogram.

How to understand your result

Looks good: Frame intervals stabilized near standard refresh boundaries with low jitter.
Check this: Measured Hz was lower than expected (check if OS display settings are locked to 60Hz).

Troubleshooting: what to try next

  • In Windows, open Display Settings > Advanced Display and confirm refresh rate is set to maximum.
  • Check video cable: HDMI 1.4 caps high resolutions at 60Hz; use DisplayPort or HDMI 2.0+.

What this test cannot tell you

Variable refresh rate (G-Sync/FreeSync) displays will report current desktop idle refresh rate.

Frequently Asked Questions

EP
Tested & Reviewed by [REAL AUTHOR NAME - OWNER TO COMPLETE]
Last Reviewed: 2026-10-17 • Test Method: High-precision performance.now() delta timing across 300 rAF cycles • How We Test