Perceptle scoring, with a calculator

A Perceptle score is not “how many tests you got right.” Each test returns an integer from 0 to 100 using score = round(100 × exp(−0.5 × (error / σ)²)). The total is round((Count + Track + Angle + Tempo + Split) / 5). I checked that formula against the public client and against three worked examples on 22 October 2026. The letter cuts are S ≥ 95, A ≥ 85, B ≥ 70, C ≥ 55, D ≥ 40, and F below 40.

Here is the average I use when I explain a close call. Scores of 80, 90, 70, 85, and 95 sum to 420, which is 84, a B. Raise the 70 to 73 and the sum is 423, which rounds to 85, an A. Three points on the weakest test cross a grade. Across 9–22 October the public average total was about 64, and Tempo was the test sitting in the 30s and 40s. A 65 matches that crowd. It is not “top third,” because the API does not publish a histogram.

Calculator

The game can show “beats this percent of today’s players” only after a score is submitted to its server. I do not reprint those lines as if they were stable. The stats API gives a player count and five averages, which is what the stats page uses. If your grade seems to use 1,000 points or ten tests, you are on a different site. The version page separates them.