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TOOLS

Monitor Refresh Rate: Compare Browser Timing with Windows

This tool estimates how often the browser updates its rendering. It cannot read the monitor’s configured or maximum refresh rate, or your game’s FPS. Check Windows first, then compare the two measurements separately.

Choose the monitor and measure for about four seconds

  1. In Windows Settings → System → Display → Advanced display, select the target monitor and record the configured refresh rate.
  2. Keep this window entirely on that monitor, not across displays. Use the same laptop power conditions for each comparison.
  3. Start the measurement and keep the tab visible. Cancel before moving the window to another monitor, then measure again.

If Windows remains at 60 Hz or differs from this estimate, use the symptom table, change one setting, then return here to measure again.

Compare Windows with the browser estimate

  • Windows also shows 60 Hz: if the monitor supports more, use the Windows and connection checks. This estimate alone does not diagnose a faulty cable.
  • Windows shows 144 Hz or more, but the browser is near 60 updates/second: repeat with the tab visible and check browser power-saving settings and PC load. The browser result alone does not prove Windows failed to apply the setting.
  • Windows and browser are high, but only the game is slow: check game FPS and graphics settings. This page does not measure game FPS.
  • Results vary or measurement is interrupted: keep the tab visible, on the same monitor and under the same power conditions. Values are rounded estimates; a difference such as 143 versus 144 does not establish a fault.

Retest under the same conditions

  1. Recheck the target monitor and configured Hz in Windows Advanced display.
  2. Place this page on the same monitor and measure again. Compare the Windows value and browser estimate separately.
  3. If Windows is now at a high rate but only the game is uneven, use the game-only checks. If a higher rate is still unavailable, check cables and ports.

Hz and FPS are different

Refresh rate is how often the monitor refreshes each second. FPS is how many frames the game produces. A 144-Hz screen does not make a 60-FPS game produce 144 distinct frames. Use the low-FPS guide for the game itself.

How the estimate works and its limits

The tool collects browser animation-callback intervals for about four seconds and calculates updates per second from the median. It also shows the central 80% of intervals. This spread describes callback timing, not pixel response time or input latency.

Browser load, power saving and hidden tabs affect timing. It does not certify variable-refresh-rate behavior or maximum panel performance. Measurement stops when the tab is hidden.

The displayed value is a measurement in this browser now. It is not a claim that accuracy was validated on a particular 144-Hz or 240-Hz physical monitor.

References