Decimal conversions of the most common American odds — favorites on the left, underdogs on the right.
FAVORITESminus odds · decimal below 2.00
−1051.95
−1101.91
−1151.87
−1201.83
−1251.80
−1301.77
−1501.67
−2001.50
−3001.33
UNDERDOGSplus odds · decimal 2.00 and above
+1002.00
+1052.05
+1102.10
+1152.15
+1202.20
+1252.25
+1302.30
+1502.50
+2003.00
+3004.00
+100 = 2.00Even money: profit equals your stake. Everything else falls on one side of it.
How to Use the Odds Calculator
Five steps, one running example. Before or after placing a bet, you can also check Public Betting Percentages to see which sides the public is on.
Example: $20 on the Chicago Bears moneyline at −125 vs. Detroit
STEP 1
Enter Odds
Type any format — American, Decimal, or Fractional.
Odds: −125
STEP 2
Bet Amount
Add your stake in U.S. dollars — cents included.
Stake: $20.00
STEP 3
Payout & To Win
Payout is the total you receive; To Win is your profit.
$36 · Win $16
STEP 4
Converted Odds
Read implied probability and the other two formats.
55.56% · 1.80 · 4/5
STEP 5
Reset or Retype
Hit Reset — or just enter new values in any field.
RESET ⟲
One Bet, Three Formats
The same $20 bet on the Bears at −125 — written in the three odds format. BetMGM uses American odds in the U.S.; the calculator converts the rest.
AMERICAN
U.S. default
−125
Baseline of $100. Minus = favorite: stake $125 to profit $100. Plus = underdog: stake $100 to profit that amount.
−125 → risk $125 to win $100
DECIMAL
Europe
1.80
Total payout per $1 of stake, stake included. Below 2.00 = favorite; 2.00 and above = underdog.
$20 × 1.80 = $36 payout
FRACTIONAL
UK · horse racing
4/5
Simply profit over stake: $4 profit for every $5 staked. Common in horse racing in the U.S. too.
$20 stake → $16 profit
Implied Probability — Where the Value Hides
Implied probability converts odds into a win percentage. The calculator does it automatically — comparing it against your own estimate is how bettors find value.
Bears moneyline −125 implies55.56%
The odds say the Bears win this game 55.56 times out of 100. Use it to filter bets — e.g., only markets above 55%, or longer plus odds with bigger payouts.
FINDING VALUE
60%your estimate
>
55.56%implied by −125
If your analysis gives the Bears a 60% chance, −125 is good value. At a fair 60% the line would be −150 — where the same $20 profits only $13.33 instead of $16.
Sports Betting Odds FAQs
Implied probability converts odds into a win percentage. The calculator does it automatically — comparing it against your own estimate is how bettors find value.
What’s the Difference Between Payout and To Win?
Payout is the total amount a bettor receives after winning a bet. The “To Win” or profit amount is what a player profits from a bet. If your stake is $20 with odds of -125, the payout is $36. This amount includes your stake of $20. Â To Win (Profit):Â $36 – $20 = $16
What Does Even Money (+100) Mean?
If you place an even-money bet — with +100 American odds — your stake will be identical to your profit. This also means your total payout is exactly twice the amount of your stake.
For example: $10 stake for a $20 payout, or $10 profit
How Do Spread Odds Work?
Some bets only include odds (e.g., -125). Others — including most notably spread bets — include a number and odds.
For example: If the Bears are -125 moneyline favorites against the Lions, the spread might be Bears -1.5 (and Lions +1.5). To win the -1.5 spread bet, the Bears must win by at least two points. Alternatively, the Lions must win the game, tie, or lose the game by one point to win the +1.5 spread bet.
Accompanying the spread are odds. If the Bears are -1.5, the odds might be -110.
The BetMGM Sports Betting Odds Calculator works for any type of bet. It could be moneyline, spread, over/under total (e.g., total points), or player prop (e.g., passing yards in a game).
Ready to place a bet?
Odds checked, payout calculated — the sportsbook is one tap away.
