The simplest, fastest betting math: enter your stake and the American odds, and we'll show your profit if the bet wins, total return, ROI percentage, and the implied probability baked into the price. Last updated: May 2026.
For positive odds (+150): profit = stake × (odds ÷ 100). For negative odds (-110): profit = stake × (100 ÷ |odds|). Total return is profit plus your original stake.
Profit is what you win on top of your stake. Total return is profit plus stake — the amount the book actually pays out to you. A $100 bet at +200 has $200 profit and $300 total return.
Return on investment — your profit expressed as a percentage of your stake. A $100 bet that wins $200 has 200% ROI. ROI is identical for the same odds regardless of stake size.
The win rate baked into the offered odds. It's 1 ÷ decimal odds. If your true win probability beats it, the bet is +EV. If not, the bet is -EV.
This calculator shows the payout exactly as the book has priced it — the vig is already inside the odds. To see the no-vig fair price, use the odds converter and back out the juice manually.