Futures are single wagers placed on the outcomes of events, which are determined at sometime in the future. For example, a future may involve picking the winner of the NFL championship, the Stanley Cup, or the World Series.
To calculate your payout, simply translate the odds (a moneyline such as -110, -180, +140 etc., or fixed odds such as 3/1) to a multiplier (the Payoff Price plus one).
Take the multiplier and multiply this by your bet to determine your Payout or Win Amount (Payoff Price plus your original bet).