How this works
Enter the values shown, review the result, and verify assumptions before acting. The calculation is performed on your device without uploading these entries.
Compute percentage of correct keystrokes. The input fields are labeled with the units or formats used in the calculation. Change one value at a time to see how the result responds, and compare the output with the worked example below.
Formula or method
The method above describes the calculation or algorithm being used by this browser utility. It is shown so you can understand the result, check assumptions and repeat the calculation independently if needed.
Worked example
Five errors out of 200 keystrokes gives 97.5% accuracy.
Limitations and accuracy
Accuracy alone does not capture hesitation or corrected errors.
The calculation runs locally in your browser. No result is guaranteed to be suitable for financial, legal, medical, or safety-critical decisions. Check independent authoritative sources in those cases.
More context
Most typing tests report words per minute by dividing correctly typed characters by five and then scaling to one minute. Accuracy should be assessed separately: a fast attempt with many mistakes is not necessarily more useful than a controlled, slightly slower attempt. To track improvement, take several comparable tests using the same time limit. A single score can be distorted by familiarity with the sample, punctuation, fatigue or the input device.