The Futures Calculator allows you to enter complete futures odds for multiple outcomes like NBA, NFL and MLB future lines that contain every team. It is going to give you the complete implied probability of the future market. Generally the futures calculator will indicate a very high sportsbook edge when all the outcomes are entered. It is important to note that -110 odds in a spread bet are very different than -110 odds in futures betting. Though the payout is the same, -110 odds in any more than 2-way betting means that the implied probability is below 50%. That means that the sportsbook has an even bigger edge over you and you need to take that into account. The other important factor to take into account is the investing principal of “opportunity cost”: your money will be tied up for an entire season. Finally, there is the matter of interest. You need to calculate the loss on interest you might have earned on that money just sitting in a bank account. Though likely no more than 1%, that is another factor adjusting futures in the books favor. To make the decision to place a futures bet, you need to be sure that the payoff is exponentially more than the risk reward of placing that same bet on a game tonight.
To use the Futures Calculator make sure you enter all values in the futures market, not just the ones you intend to bet. After calculating you will see the House Edge on the future market and can decide if that edge compared to your odds are going to be worth the long term investment of betting futures.