Free betting tools
Free calculators and converters for arbitrage betting and odds format conversion. No account needed — just open and use.
Arbitrage Betting Calculator
Most popularEnter decimal odds from two or three bookmakers and instantly get optimal stake sizes, guaranteed profit, and ROI. Supports 2-way and 3-way markets.
Works for all sports · 2-way & 3-way markets · Copy-paste outputOpen →
Betting Odds Converter
FreeConvert between decimal (AU/EU), fractional (UK), American (moneyline), Hong Kong odds and implied probability. Includes a reference table of common odds.
Decimal · Fractional · American · HK · Implied %Open →