Typing Accuracy Calculator Formula

Understand the math behind the typing accuracy calculator. Each variable explained with a worked example.

Use the Typing Accuracy Calculator

Formulas Used

Typing Accuracy

accuracy = (correct_keys / total_keys) * 100

Total Errors

errors = total_keys - correct_keys

Error Rate

error_rate = ((total_keys - correct_keys) / total_keys) * 100

Variables

VariableDescriptionDefault
correct_keysCorrect Keystrokes475
total_keysTotal Keystrokes500

How It Works

How to Calculate Typing Accuracy

Typing accuracy measures the percentage of keystrokes that are correct.

Formula

Accuracy = (Correct Keystrokes / Total Keystrokes) x 100

Benchmarks

  • Below 90%: Needs improvement
  • 90–95%: Average
  • 95–98%: Good
  • 98%+: Excellent / Professional

    • Worked Example

    A student types 500 keystrokes with 475 correct.

    correct_keys = 475total_keys = 500
    1. 01Accuracy = (475 / 500) x 100 = 95%
    2. 02Errors = 500 - 475 = 25
    3. 03Error rate = (25 / 500) x 100 = 5%

    Ready to run the numbers?

    Open Typing Accuracy Calculator