This profit is how bookmakers finance their services but bookmakers vary in the margins they apply. The bookmaker margin is a measure of the bookmaker’s profit margin for an event and is a hidden transaction cost for punters. The bookmaker margin, also known as the overround, the cut or the take, is the hidden amount charged by a bookmaker for accepting a wager. To use the calculator, select your preferred odds format, input the odds for as many selections as you need, then press “Calculate”. Arbitrage opportunities are highlighted if they exist. This tool calculates the bookmaker margin (overround) and vigorish (vig) for a set of entered odds. You are here: Home > Tools > Online Calculators > Bookmaker Margin Calculator

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