// multi-utility computation suite · offline · instant · precise
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sci.Elo-rating-update Calculator
Calculates Elo rating updates for two players after a game: ΔR_A = K(S_A − E_A), where E_A = 1/(1+10^((R_B−R_A)/400)) is the expected score. K-factor = 32 for provisional players, 16 for established — a 400-point rating difference implies 90.9% expected win probability.
Inputs
Ra
Rate of charge flow (A). I = V/R. Above ~100 mA through the body can be lethal. Fuses protect against overcurrent.
Rb
Rate of charge flow (A). I = V/R. Above ~100 mA through the body can be lethal. Fuses protect against overcurrent.
Score A
Reference formula or conversion factor shown for context.
K Factor
A multiplier applied in the calculation.
Results
expected score Ea for A
A numerical rating from the scoring model in use.
Elo change ΔRa
Sample size or count used in the calculation.
new rating for A
A standardised quality or risk rating on the applicable scale.
Ea = 1/(1+10^((Rb-Ra)/400))
Reference formula or conversion factor shown for context.
K-factor
A dimensionless multiplier applied in the calculation.
rating categories
A standardised quality or risk rating on the applicable scale.