Step Bet Calculator . The betting odds calculator allows you to input your stake & odds in American, Decimal, or Fractional formats to quickly calculate the payout for your bets. Our matched betting calculator sometimes called a back lay calculator, lay bet calculator or a risk-free bet The next step is to enter the odds into the calculator. Matched Betting Calculator (Timothy Garrett) Our matched betting calculator sometimes called a back lay calculator, lay bet calculator or a risk-free bet The next step is to enter the odds into the calculator. A series of calculators to help a sports bettor convert odds, size bets correctly or evaluate winrate. Here are the simple steps that must be followed to make use of the bet calculator The bet calculator helps you to see how much you have won on your bet. The bet calculator is easy to use and the basic function is to work out the profit or loss from a winning or losing bet. Bets calculator allows you to count,