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Odds converter & parlay calculator. Decimal, American, Fractional, HK, Malay, Indonesian. 10 languages. betting-odds-calculator.com. 🧮 Betting Odds Calculator — the fastest odds converter and parlay calculator for serious bettors. Stop switching tabs or doing mental math mid-bet. Open the popup, enter your odds, and get instant results for every format at once. ⚡ What You Can Do ⇄ Odds Converter Convert any odds format into all others with a single click: · Decimal (European) — e.g. 2.50 · American (Moneyline) — e.g. +150 / -110 · Fractional (UK) — e.g. 3/2 · Hong Kong · Indonesian · Malay Plus instant Implied Probability so you can spot value immediately. 🎯 Parlay / Accumulator Calculator Build multi-leg parlays up to 12 legs: · Enter decimal odds for each selection · Set your stake · Get combined odds, total payout, and profit in one click Perfect for accumulators, round robins, and combo bets. 📊 Implied Probability & Edge Enter decimal odds to see: · Implied probability (%) · Your edge vs. the 50% breakeven point Know instantly whether a bet has positive expected value. 🌍 10 Languages Supported The calculator auto-detects your browser language and switches automatically. Manually choose from: 🇺🇸 English · 🇪🇸 Spanish · 🇵🇹 Portuguese · 🇩🇪 German · 🇫🇷 French · 🇮🇹 Italian · 🇹🇷 Turkish · 🇷🇺 Russian · 🇨🇳 Chinese · 🇸🇦 Arabic Your language preference is saved across sessions. 🔒 Privacy First · Zero permissions required — no access to browsing history, tabs, or websites · No data collection — all calculations run locally in the browser · No account needed — works immediately after install · Language preference stored only in your browser's local storage 🏆 Who Is This For? · Sports bettors comparing odds across bookmakers · Matched bettors calculating lay stakes · Value bettors checking implied probability · Beginners learning different odds formats · Anyone who wants quick parlay math without loading a website 📐 Supported Odds Formats Decimal — 2.50 — Europe, Australia American — +150 / -110 — USA Fractional — 3/2 — UK, Ireland Hong Kong — 1.50 — Asia Indonesian — 1.50 / -1.50 — Indonesia Malay — 0.50 / -0.50 — Malaysia 🔗 More Tools Full web calculator with additional features at betting-odds-calculator.com. Betting Odds Calculator is an informational tool only. It does not facilitate gambling. Always gamble responsibly.