Betting Calculators: Odds Converter, Kelly Criterion, EV & Arbitrage

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Free professional betting calculators built for serious sports bettors. Convert odds across 6 formats, calculate optimal stake sizes, find +EV opportunities, and identify arbitrage. All tools work instantly in your browser with no sign-up required.

Asian Odds Converter

Convert between American, Decimal, Fractional, Hong Kong, Indonesian & Malay odds. The only converter that supports all 6 formats.

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Kelly Criterion Calculator

Calculate the mathematically optimal bet size based on your edge, odds, and bankroll. Supports singles and parlays.

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Expected Value (EV) Calculator

Determine if a bet is +EV or -EV before placing it. Shows exact dollar edge, implied probability, and long-run projections.

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Arbitrage Calculator

Find guaranteed-profit arb opportunities across sportsbooks. 2-way and 3-way support with exact stake splits.

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Quick-Access Calculators

The original odds converter, parlay calculator, and Asian handicap calculator are also available below for quick use.

Odds Converter

Convert between American, Decimal, and Fractional odds formats instantly. For the full 6-format converter including Asian formats, use the Asian Odds Converter.

Odds Converter

American

Decimal

Fractional

Parlay Calculator

Calculate your parlay payout across multiple legs. Add up to 10 selections and see your combined odds, total payout, and implied probability.

Parlay Calculator

Enter decimal odds for each leg. Add up to 10 legs.

Stake ($)

Total Payout

$0.00

Asian Handicap Calculator

Calculate your Asian Handicap bet outcome based on handicap line, odds, and match result. Supports full, half, and quarter lines.

Asian Handicap Calculator

Calculate your AH bet outcome based on handicap line, odds, and match result.

Your Team

Handicap Line

Odds (Decimal)

Stake ($)

Match Result (Your Team Goals - Opponent Goals)

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