I made this calculator to play quarter keno machines on 2 spots. The idea is to increase your bet during play so you make a profit on your first win. Starting Bet This amount of your initial bet. Maximum Bet This is maximum bet amount. For example: If the keno machine takes up to 30 quarters, then the max bet is 30 x .25 = 7.50 Payout for every bet This is the payout ratio. For example: If you play 2 spots and it pays out 2.25 for every quarter, then enter 2.25 Payout for every .25 bet (unit) So in this case, the unit that displays in the results is the amount of quarters you have to put in the machine. Minimum Profit Setting the minimum profit will increase your bet amount so your profit never falls below this number. Bet Increment The machine doesn't allow you to bet a nickel on a quarter machine, even if the nickel will get you a profit. So your bet much increase by a quarter, dime, or what ever you set it to here.