Official Error Evaluation & Net Speed Calculation Formulas
Government typing assessments do not measure raw speed; they measure Net Speed after severe error deductions. Understanding how mistakes are mathematically evaluated is essential to avoiding disqualification.
1. Full Mistakes (1.0 Penalty)
- Omission of word(s): Skipping a word or sentence.
- Substitution: Typing an incorrect word in place of master text.
- Addition: Typing a word not present in the master passage.
2. Half Mistakes (0.5 Penalty)
- Spelling Slips: A single transposed or misplaced character.
- Capitalization: Typing lowercase for uppercase or vice versa.
- Spacing Errors: Missing spaces or repeated double spacing.
Standard Net Words Per Minute Formula:
Net WPM = [Total Words Typed - (Mistakes Exceeding Concession × 10)] ÷ Test Duration in Minutes
Because each excess mistake cancels out 10 correct words, 3 uncorrected errors can erase 30 words (or 3 WPM) off your official score.