Formula for calculating Typing Speed
Here WPM = Word Per Minute
All typed entries = Total Key Strokes (or key depression)
Gross WPM is really the typing speed that you typed in one minute its getting by total key Stroke (Key depression) divided by 5 (One word = 5 character) and then divided by total minute to get word per minute speed.
If you type 200 character in 1 minute then your typing speed will be = 200/5 = 40 WPM
But GWPM is not your actual speed, actual speed is calculating by correct word you typed known as 'Net WPM'.
Note: delete, backspace, shift and other keys are not calculated in key stroke.
Net WPM Formula
Calculation of Net WPM
Net speed can be calculated by deducting errors in gross wpm. For example if you typed 40 Word in 1 Minute but you typed 3 word wrong then your Net WPM = 40 - 3 = 37 WPM
Calculation of ErrorsErrors are calculated by following two criteria
1. Errors thats correctedIf you correct wrong word that you typed then you will use backspace to delete that word will not calculated in WPM.
2. Errors that are incorrectIf you not correct the errors you made then you will penalize 5 character for each word error (Regardless of how many character in this wrong word). So always try to type accurate and if mistake made then correct it.
Calculation of Accuracy