TomoAlien's BMS Level Calculator

It's a small script written in JavaScript that allows for easy calculation of difficulty level for BMS songs based on 6 parameters:

• Amount of Standard Notes
• Amount of Scratch Notes
• Song Length (in seconds)
• Weight for Standard Note
• Weight for Scratch Note
• Overall difficulty meter multiplier

Weights change how much does the type of note affect the result.

Generalized Function: BMSlevelCalc(notes,noteWeight,scratch,scratchWeight,length,multiplier)

Optimum Five-Key chart rating function: FiveLevelCalc(notes,scratch,length)

Optimum Five-Key chart rating weights and multiplier (as determined by testing):

• Standard Note weight: 2
• Scratch Note weight: 3
• Multiplier: 4/7 (Yes, that's 4 divided by 7)

The formula that calculates the score: ``(notesnoteWeight+scratchscratchWeight)/length*multiplier```

Obviously, this being an automated system, it's more of a suggestion rather than a replacement for rating a song with own judgement.

Feel free to copy this formula and use it for yourself. Credit is appreciated, but not required! :)