WPM, Accuracy & Consistency: What Your Typing Score Really Means

Most typing tests hand you a score and leave you to guess how it was produced. Below is exactly how The Typing Hub calculates every number on your results screen — the real formulas, not a paraphrase. Once you can see the arithmetic, the numbers stop being a verdict and start being a diagnosis.

Net WPM: only correct characters count

The five-character word is a convention borrowed from typewriter-era testing: rather than counting actual words, which vary wildly in length, every five characters counts as one word. Your net WPM is the number of characters that matched the target text, divided by five, divided by the minutes elapsed. A character that never matched is worth nothing — it does not subtract, it simply never contributes.

Raw WPM: the speed you felt

Raw WPM applies the same formula to every character you typed, correct or not. This is the number that matches your subjective sense of how fast your hands moved. The gap between raw and net is the most useful single figure on the results screen: it is the exact cost of your mistakes, expressed in words per minute. A raw of 80 against a net of 60 means a quarter of your effort produced nothing.

CPM is always exactly five times your WPM

It is often assumed CPM is a separate, more granular measurement. Here it is not. CPM is the count of correct characters per minute — the same correct-character total behind net WPM, just without the division by five. That makes CPM identical to your net WPM multiplied by five, every time, with no exceptions beyond rounding. It is worth knowing so you do not read meaning into a number that carries none beyond a change of units.

Accuracy counts keystrokes, not the finished text

This is the number that surprises people most. Accuracy is measured on keystrokes as they happen, not on the passage you end up with. Every key you press is counted once, and any key that did not match what was expected at that moment is counted as an error — permanently. Backspacing over a mistake repairs the text, but it does not repair the record. That is why you can finish a test with a visibly flawless passage and still score 96%.

That design is deliberate. Accuracy is meant to measure how cleanly you type, not how diligently you proofread. A typist who hits the right key first time is doing something genuinely different from one who types twice as many keys and corrects the difference — and the metric should say so.

Consistency: how your speed is actually scored

Consistency is the least standardised metric in typing, so here is precisely how it works here. Your speed is sampled once per second for the whole test, producing a series of per-second WPM values. From that series we take the standard deviation and divide it by the mean — a statistic called the coefficient of variation, which expresses how spread out your speed was relative to how fast you were going. Consistency is that value inverted and turned into a percentage: 100 minus the variation, clamped to a 0–100 range.

Dividing by the mean is the part that matters, because it makes the score fair across ability levels. Swinging by ten WPM around an average of forty is a much bigger wobble than the same ten WPM around an average of a hundred, and the coefficient of variation reflects that. A metronomic typist approaches 100; one who fires off bursts between pauses can score below 60 even with a strong WPM.

Reading the four numbers as one diagnosis

Taken together, the numbers point to different problems and different fixes:

• A large raw-to-net gap means errors are the bottleneck — slow down until the gap narrows, and your net WPM will rise without typing any faster.
• High accuracy but low consistency usually means uneven familiarity: you fly through common words and stall on awkward ones. Practise the stalls, not the whole passage.
• Low accuracy with high consistency means you are steadily typing the wrong keys — a technique problem, not a rhythm problem.
• Consistency climbing while WPM stays flat is progress, not a plateau. A smoother pace almost always precedes a higher ceiling.

The pattern worth internalising is that speed is an output, not an input. Accuracy and consistency are the two variables you can actually control on the next test, and WPM is what happens when both improve.