TerminalExecutionOdds337ToolsContact
    DocsLog in
    1. Home
    2. Tools
    3. Odds boost
    Free tool

    Odds boost calculator

    Is the boost +EV? And the lay that locks it in.

    Your boost

    Is the boosted price worth more than the real one?

    $
    50
    0
    0
    $
    0

    Cap on the extra winnings

    0

    e.g. from a sharp book, no margin

    Result

    Fill in the numbers to see the result.

    How it works

    • A boost on winnings of p% turns odds o into 1 + (o − 1) × (1 + p).
    • EV compares the boosted price with the fair price: stake × (boosted ÷ fair − 1).
    • Laying at the exchange turns that edge into the same profit win or lose.

    Betting involves risk. Bookmakers can restrict or close accounts and void bets, automation can fail, prices move, and a positive expected value (+EV) bet can still lose. Promotions carry each bookmaker's own terms. There is no guarantee of profit. See responsible gambling for limits and support.

    More tools

    All tools

    • 2nd / 3rd racing promos

      Value a bonus-back-if-2nd/3rd, boost or pump from Betfair prices.

    • Bonus bet converter (exchange)

      Lay stake and cash kept when you hedge a bonus bet on a horse at Betfair.

    • Bonus bet converter (cross-book)

      Turn a bonus bet into cash by backing the other side at another bookie.

    By the B337 team. Last updated 8 October 2026.

    Products

    • Terminal
    • Execution API
    • Full Automation

    Guides and tools

    • How betting bots work
    • Money back racing promos
    • Bonus bet converter
    • Terminal pricing
    • Execution pricing
    • How tokens work

    Company

    • About
    • Security
    • Responsible gambling
    • Contact
    • Terms
    • Privacy

    Think. Is this a bet you really want to place?

    18+ only. For free and confidential support call 1800 858 858 or visit gamblinghelponline.org.au. Self-exclusion: BetStop (betstop.gov.au).

    B337 is software, not a bookmaker or wagering service provider. Bets are placed in accounts you hold with Australian bookmakers. Bookmaker names are trade marks of their owners; B337 is not affiliated with or endorsed by them. Bookmaker terms may restrict automated betting.

    Bet337 © 2026Join our Discord