SportsBetting tools
Simple, honest calculators to help you understand odds, size stakes and spot value — not to "beat" the bookmaker (nothing does that). All free, all in your browser.
🔁 Odds converter Switch between decimal, fractional & American odds and see the implied probability. 🧮 Bet calculator Enter a stake and odds to see your return and profit instantly. ➕ Accumulator calculator Add each leg to get the combined odds, return and profit on an acca/parlay. 🏇 Each-way calculator Work out win and place returns with any place terms. 📐 Kelly criterion calculator Size your stake by your edge — with safer fractional-Kelly options. ⚖️ Arbitrage calculator Check for a sure-bet and split stakes across two bookmakers. 📊 Margin calculator Reveal a market's built-in overround — lower margin means better value. 🔄 Matched betting calculator Lay-stake, liability and locked-in profit for qualifying and free bets. 🛟 Hedging calculator Lock in a profit or cut a loss by staking the opposite outcome. 💎 Value bet calculator Expected value and edge from the odds and your own probability. 🍰 Dutching calculator Split one stake across several selections to win the same amount whichever lands. 🎯 Implied probability calculator Turn odds into a win probability — and see the market’s built-in margin. 🌏 Asian handicap calculator Settle any handicap line, including quarter lines, and see your return. 💰 Bankroll & unit calculator Set a safe unit size from your bankroll and keep stakes disciplined. 🎟️ Free bet value calculator See the real cash value of a stake-not-returned free bet via the exchange. 🎁 Bonus wagering calculator See the real turnover and estimated cost to clear a bonus — and if it’s worth it. 🎯 Break-even win rate The win rate you need at any odds just to break even — before the margin. 🛡️ Acca insurance calculator What a one-leg-down refund is really worth on an accumulator. 🏇 Place terms calculator Each-way place returns for any place fraction and number of places. 📒 Bet tracker Log your bets and see your real profit, ROI and win rate over time — free with an account. ↔️ Lay bet calculator Lay stake, liability and locked-in profit for exchange and matched betting. 🏇 Rule 4 calculator Apply Tattersalls Rule 4 deductions when a horse is withdrawn. 🍀 Lucky 15 calculator 4 selections, 15 bets — returns with single-winner and all-winner bonuses. 🍀 Lucky 31 calculator 5 selections, 31 bets — full returns with Lucky bonuses. 🍀 Lucky 63 calculator 6 selections, 63 bets — full returns with Lucky bonuses. 🎯 Yankee calculator 4 selections, 11 bets — 6 doubles, 4 trebles and a fourfold. 🎯 Canadian calculator 5 selections, 26 bets (Super Yankee) — full-cover returns. 🎯 Heinz calculator 6 selections, 57 bets — doubles up to a sixfold. 🎯 Super Heinz calculator 7 selections, 120 bets — full-cover returns. 🎯 Goliath calculator 8 selections, 247 bets — the big full-cover multiple. 🎲 Trixie calculator 3 selections, 4 bets — 3 doubles and a treble. 🎲 Patent calculator 3 selections, 7 bets — singles, doubles and a treble. 🎲 Round robin calculator 3 selections, 10 bets — Trixie plus up-and-down pairs.
18+. Tools are informational, not betting advice. Bet responsibly.