Smarter Trades - Free Betfair Trading Tools

Free calculators for exchange bettors – no login, no cost.

Tools & Calculators

Use these calculators to price trades, hedge accurately, and manage bankroll risk. Every tool runs in your browser and supports Betfair exchange logic.

Lay Liability Calculator

Shows the exact liability for lay bets so you know the maximum downside.

  • Check risk before laying a selection.
  • Compare liability vs potential profit.

Fix-a-Bet Calculator

Adjust stake size to reach a target return or desired profit figure.

  • Plan stakes for a specific payout.
  • Reverse engineer your stake size.

Back/Lay Hedge Calculator

Calculate hedge stakes to green up and lock in profits across outcomes.

  • Balance profit after odds move.
  • Plan exits for back-to-lay trades.

Expected Value (EV) Calculator

Calculate EV to understand whether a price is profitable over the long term.

  • Compare your probability vs market odds.
  • Filter for +EV decisions.

Dutching Calculator

Split stakes across multiple outcomes to level profit.

  • Cover multiple selections in one market.
  • Plan stakes to equalise returns.

Kelly Staking Calculator

Find the optimal stake size based on your edge and bankroll.

  • Apply Kelly staking to exchange prices.
  • Keep growth consistent and measured.

Matched Betting Calculator

Compare bookmaker offers with exchange lays to lock in qualifying profit.

  • Work out lay stakes for promos.
  • Measure qualifying loss quickly.

Acca Calculator

Calculate combined returns on accumulator bets and parlays.

  • See payout projections across legs.
  • Compare acca vs single stakes.

Odds Converter

Convert odds between decimal, fractional, and implied probability.

  • Translate odds quickly between formats.
  • Check implied probability on the fly.