Three fields, one click, done. Enter your stake, type in the odds, pick your format, and the moneyline bet calculator spits back your profit, total payout, and implied probability instantly — no math required.
What do the three input fields mean?
Stake is simply how much money you want to risk. Type any dollar amount — $5, $50, $500. The minimum deposit at some licensed US sportsbooks is as low as $5, so even small bets are worth running through the tool before you place them.
Odds is the number posted by the sportsbook. That might be +150, -200, or anything in between. If you're betting a favorite, the number will be negative. Underdogs carry a plus sign. Forget the minus sign when you enter a favorite and the output will be completely wrong — double-check that before you click.
Odds format lets you choose American, decimal, or fractional. Most US sportsbooks display American odds by default, so that's probably the one you want. If you're reading lines from a European book or converting for comparison, switch to decimal or fractional. For a deeper look at converting between formats, visit the odds converter guide.
How do you read the results?
The calculator returns three numbers: profit (what you gain on top of your stake if you win), total payout (profit plus your original stake returned), and implied probability (the win percentage the odds suggest).
Quick example: a $50 bet at +180 returns $90 profit and a $140 total payout. At -200, that same $50 wager returns $25 profit and $75 total. The implied probability at -200 is roughly 67% — meaning the sportsbook is pricing that side as a two-thirds chance to win.
Want to understand the math sitting behind those figures? The moneyline payout formula page walks through every calculation by hand so you can verify the tool's output yourself.
Step-by-step walkthrough
- Open the calculator at the top of the page.
- Enter your stake in the first field — dollars only, no currency symbols needed.
- Type in the odds exactly as shown at your sportsbook, including the minus sign for favorites.
- Confirm the odds format is set to American (or switch it if your line is in decimal or fractional).
- Hit calculate. Profit, total payout, and implied probability appear immediately below.
- Adjust the stake or odds and recalculate as many times as you like — great for line shopping across FanDuel, DraftKings, BetMGM, and other books.
What does implied probability actually tell you?
It tells you the break-even win rate the odds demand. If you're considering a bet priced at -110 — standard for spreads and totals — the implied probability is roughly 52.4%. Win less than that over time and you're losing money. The implied probability guide covers this in full, including how the vig pushes combined probabilities past 100%.
That built-in edge is worth understanding before you fire off parlays. The moneyline parlay calculator shows how the vig compounds across multiple legs.
Does the calculator work for every sport?
Yes. The same American odds formulas apply to NFL, NBA, MLB, NHL, college football, soccer, tennis — any sport that posts a moneyline. For football-specific examples and common game-day scenarios, check the NFL moneyline calculator page.
One more thing: if you win, the IRS wants to know. All gambling winnings are taxable income regardless of amount, and a new W-2G reporting threshold takes effect for 2026 earnings. Read the full breakdown on the 2026 W-2G rule change page, or go straight to IRS Topic 419 for the official guidance.
Must be 21+ to bet at most licensed US sportsbooks (18+ in Wyoming and Tennessee). If you need to understand why American moneyline odds look the way they do before running your first calculation, that guide is the right starting point. Gambling problem? Call 1-800-GAMBLER.