Draw no bet (DNB) is a betting option offered by many bookmakers that allows you to gain profit if you guess the winner of the match, but you get back your stake if the score is a draw. This privilege is, of course, at the cost of reduced odds for the team to win the game. Even if your bookmaker is not offering this option for the event you are interested in, you can still place this type of bet by using this calculator. It estimates the ratio in which you have to distribute your stake between two bets (for a victory of one of the teams and for a draw) for your financial return to be zero in case of a draw.
You can also use the calculator to check if your bookmaker is offering fair odds for DNB and, if not, construct your own combination. You can also play DNB, placing the two bets at two different bookmakers and taking advantage of the higher odds they are offering for different outcomes. You can even play DNB on a betting exchange.
The odds in the formulas are in decimal format.