Bet calculator · live math
Money in. Real number out.
Plug in a stake and American odds — see decimal odds, vig-free implied probability, payout, profit. Stack legs for a parlay — the joint-probability collapse shows how fast chalk parlays die.
Single bet
Decimal1.91
Implied52.4%
Payout$190.91
Profit$90.91
Parlay builder
- #1Odds40.0% implied
- #2Odds33.3% implied
Combined American+650
Decimal odds7.50
True joint probability13.33%
Payout on $100$750.00
Joint probability is the chance every leg cashes — multiply each leg's implied probability. Books price each leg with vig, so the combined American number undersells the edge you need. For sharper picks, hit the parlay engine →