osu!DiffCalc - web version
An attempt to accurately compute beatmap difficulty and player ranking.
last full update: 2574d:12h:52m ago - last player update: 258d:02h:58m ago
Beatmap difficulty
The level of a beatmap is determined by it's so called speed and aim difficulty. Speed difficulty is greatly determined by how fast the map is while aim difficulty depends on how hard it is to aim correctly.
If you want to add unranked maps to the listing then go here.