A judgement, or hit result, is the outcome of interacting with a hit object during its hit window. Score and accuracy are calculated based on which judgements are received.
These are commonly referred to by their score value (except for misses), i.e. a GREAT is usually called a "300" and so on.
|Max hit error (ms)
80 - 6 × OD
140 - 8 × OD
200 - 10 × OD
The hit window depends on the beatmap's overall difficulty (OD). A hit is then considered inside a hit window if
hit error < max hit error, meaning the value listed is half of the hit window width.
The hit error is rounded and the max hit error values are truncated to the nearest integer, meaning the windows may be up to 1.5 ms shorter on both sides than what the formulas suggest.
|GREAT on all hit objects in a combo
|Katu or Katsu (喝)
|At least OK on all hit objects in a combo and a GREAT for the last one
|Katu or Katsu (喝)
|At least OK on all hit objects in a combo
A hit circle is judged with a GREAT, OK, MEH, or MISS depending on how accurately it is hit. Hitting a circle before the MISS window has no effect (other than causing notelock), and not hitting a circle will cause a MISS after the MEH window passes.
Sliders consist of multiple parts: the slider head, slider tail, slider ticks, and slider repeats. The slider as a whole is judged based on how many parts of the slider the player has hit, as outlined below:
|At least one slider part
The slider head only needs to be hit within the MEH hit window for a successful hit. However, if ScoreV2 is active, slider head accuracy is additionally accounted for, with the judgement received for the entire slider being limited to at most the one received for the slider head.
There are some additional quirks with how sliders influence combo:
Each spinner has a set number of spins required to complete it. This number depends on the overall difficulty of the beatmap. Spinner rotation speed is calculated based on cursor velocity and does not necessarily correspond to how many times the cursor has revolved around the spinner.
The spin requirements can be broken down into the following formulas:
|Minimum spins per second3
1.5 + 0.2 × OD if OD < 5,
1.25 + 0.25 × OD if OD ≥ 5
|Minimum spins required
|Spinner length in seconds × minimum spins per second + 0.5
If a spinner is very short, the number of spins required may be calculated to be 0, and thus the spinner will always complete itself with a GREAT.
The spinner judgement algorithm has been significantly changed in the 20190513.2 Stable release. The differences were as follows:
Replays set prior to May 10, 2019 (when the change was introduced in the Cutting Edge version) use this old algorithm rather than the one currently in effect.
Spins are internally calculated in terms of half revolutions. The formulas listed in this page are adjusted to be in terms of full spins for simplicity, so this value is thus rounded down to the nearest half. ↑
Due to the +0.5 constant in the formula for minimum spins required, the actual minimum average is
0.5 / spinner length in seconds spins per second faster. ↑