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Kalshi Arbitrage Calculator

Find risk-free profit between Kalshi event contracts and sportsbook lines. Enter the Kalshi price and the opposing sportsbook odds to see optimal stakes and guaranteed return.

Kalshi Yes Price (cents)

Outcome A on Kalshi

Sportsbook Odds (American)

On the OPPOSITE outcome

Total Stake ($)

Arbitrage found: 3.89% guaranteed return

Kalshi All-In Cost (incl. fee):49.75 cents/contract

Sportsbook Implied Probability:46.51%

Combined Implied Probability:96.26%

Kalshi Stake (1038 contracts):$516.81

Sportsbook Stake:$483.19

Guaranteed Profit:$38.87

For book-vs-book opportunities, use the classic Arbitrage Calculator. To sanity-check the Kalshi side of the trade, convert its price with the Kalshi Price to Odds Converter.

This calculator is for informational and educational purposes only. Results should be verified with your sportsbook before placing any wagers. All betting carries risk. Full Disclaimer

How to Use This Calculator

1
Enter the Kalshi Price: Input the Yes price in cents for the outcome on Kalshi (e.g. 48)
2
Enter the Sportsbook Odds: Input the American odds the sportsbook offers on the OPPOSITE outcome (e.g. -105)
3
Check for Arbitrage: If combined implied probability is under 100% after Kalshi fees, the calculator shows your stakes and guaranteed profit

Frequently Asked Questions

Can you arbitrage between Kalshi and sportsbooks?

Yes, when the same event is priced differently. Buy the Kalshi contract on one side and bet the opposite side at a sportsbook. If the Kalshi price (plus fees) and the sportsbook's implied probability sum to less than 100%, you lock in a profit no matter the outcome.

How do I find Kalshi arbitrage opportunities?

Compare Kalshi markets that mirror sportsbook lines - game winners, season totals, and award markets. Convert the sportsbook odds to implied probability and add it to the Kalshi price. Anything under about 98 cents combined (leaving room for fees) is worth checking with this calculator.

Is Kalshi arbitrage legal?

Yes. Kalshi is a CFTC-regulated exchange and sportsbooks are state-licensed operators. Betting opposite sides across the two is simply taking the best available price in each venue. Sportsbooks may limit accounts that consistently beat closing lines, so factor that into your approach.

Why is Kalshi sometimes cheaper than sportsbooks?

Kalshi prices come from an exchange order book with no built-in vig, while sportsbooks bake roughly 4-5% margin into every line. Kalshi's markets can also lag fast-moving news, briefly creating price gaps against sharp sportsbook lines in either direction.

How much profit does a Kalshi arbitrage make?

Typical cross-market gaps produce 1-4% risk-free return on total stakes. On a $1,000 combined position, that's $10-40 locked in regardless of outcome. The calculator accounts for Kalshi's trading fee, which meaningfully affects thin arbs.