Free tool

Arbitrage Calculator

Split stakes across two outcomes, see whether a true arb exists, and size each leg to lock the same payout.

Core formula

Margin = 1 - (1/odds A + 1/odds B)

Size a two-way arb
Output
Arb margin4.75%
Stake on Outcome A$495.24
Stake on Outcome B$504.76
Locked profit$49.90

Both legs equalize the gross payout. If execution slips or odds move, re-run before staking.

Use Notes

Positive margin means a true arbitrage exists.

Sherwood uses stake-splitting logic designed for equalized payouts.