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# Betting (bookmaker, bettor) calculator

The current web page allows you to calculate Vigorish (Margin) and Overround for bookmaker odds, to evaluate the proposed Line (market). Also a bettor (a professional player who bets on sports) has the ability to calculate stakes (amounts) for the betting arbitrage (surebets).

## Calculation of vigorish, overround, odds sum and difference

 C1 C2 C3 C1 ⊕ C2 C1 ⊖ C2 Vigorish, % Overround, % P1, % P2, % P3, % P1 + P2 P1 - P2 46.2 30.8 23.0 77.0 15.4

Coef, C, C1, C2, C3 - odds (coefficients; > 0)
Prob, P, P1, P2, P3 - probabilities

⊕, ⊖ - bookmaker odds Sum and Difference

Vigorish (M) and Overround (O) calculation formulas:

M = 1 - Coef*Prob, Coef = (1 - M)/Prob

M = 1 - 1/(1/C1 + 1/C2 + ... + 1/CN), when P1 + P2 + ... + PN = 1

O = M/(1 - M), M = O/(1 + O)

## Arbitrage bets (arb, surebets) calculation

 Coef 1 Coef 2 Coef 3 Margin, % Sum of Stakes Stake 1 Stake 2 Stake 3 Profit

Set two (for example: W1, W2X) or three (for example: W1, W2, X) odds and sum of stakes (total bid) to calculate

Stake - stake (wager, bet) amount

Calculation equations:

Coef_1*Stake_1 = Coef_2*Stake_2 [= Coef_3*Stake_3] = (1 - M)*Sum_of_Stakes

Page time:

Saturday
10-31-2020
06:50:28 UTC