Refresh Rate Test

Work out a display refresh rate in hertz from frame timestamps you enter.

Runs in your browser. Nothing is uploaded — your input is processed on this device and discarded when you close the tab.

Refresh Rate Test

How to use this tool

  1. Enter your values in the fields above.
  2. Press Generate to see the result.
  3. Use Load sample to try the worked example, Copy result to copy it, or Clear to start again.

Worked example

Timestamps 0, 16.7, 33.3 and 50 average about 16.67 ms apart, giving 60.0 Hz.

What this tool does not do / Limits

This calculates from the timestamps you enter, for this display in this browser only. It does not measure a different screen or device.

Frequently asked questions

How do I get timestamps?

Record frame times in your browser developer tools or a frame-timing page, then paste them here.

Is 60 Hz guaranteed?

No. The result is only as good as the timestamps entered.

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