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Betting calculators · Lines from 6 sportsbooks · Checked Tue 12:07 PM ET
Odds converterParlayHedgeExpected valueBet sizeTeaserRound robin
Betting calculators · 6 sportsbooks · Tue 12:07 PM

Expected value calculator

Is a price better than the fair one? Enter it, and the market's own chance with the books' cut taken out. You get what the bet is worth per $100 on average, and how much of a bankroll it would justify.

Is a price better than the fair one? Enter it, and the market's own chance with the books' cut taken out. You get what the bet is worth per $100 on average, and how much of a bankroll it would justify.

Odds converterParlayHedgeExpected valueBet sizeTeaserRound robin
Loaded
Colts at Steelers, Sun 1:00 PM · Colts to win at BetMGM
Worth per $100
−$2.32
Edge
-2.3%
Price that breaks even
+125
Kelly bet size
0.0%

At +120, the Colts cost $2.32 on every $100 on average, if 44.4% is right. A negative edge says not to bet at all.

Bet size at three bankrolls

Full Kelly and the quarter most bettors actually use
Bankroll
Full Kelly
Quarter Kelly
$500
$0.00
$0.00
$2,000
$0.00
$0.00
$10,000
$0.00
$0.00

Arithmetic, not a pick: the fair chance is the betting market's, and the market is often wrong in both directions. A negative edge says not to bet at all. 21+, where legal. Gambling problem? Call 1-800-GAMBLER.

Best Bets · Thursday mornings
The three widest gaps on the weekend card, in your inbox by 10.

Plus how the numbers moved since they opened, and which books held the best price. Free.

More calculators

Odds converterAny price in every format, with the book's cut taken outParlay calculatorWhat two to ten legs pay, and the true odds of hittingHedge calculatorLock in a profit on a futures bet or a live parlayBet sizeHow much to stake when you have an edgeTeaser calculatorTeased lines, the payout, and what each leg must coverRound robinEvery parlay from the same legs, and what one loss leavesOdds comparisonEvery game at every book, best price underlined
Best Bets · Thursday mornings
The three widest gaps on the weekend card, in your inbox by 10.

Plus how the numbers moved since they opened, and which books held the best price. Free.

Arithmetic, not a pick: the fair chance is the betting market's, and the market is often wrong in both directions. A negative edge says not to bet at all. 21+, where legal. Gambling problem? Call 1-800-GAMBLER.