Arbitrage Calculator Guide
Use this guide to turn quoted odds into a clear allocation and interpret the limits of the result.
1. Select a two-way or three-way market
Choose two-way only when exactly two outcomes exhaust the market. Choose three-way when a third outcome, such as a regulation-time draw, is possible. Switching to three-way loads a checked example at 2.50, 3.50 and 3.50. Switching back retains the first two current prices. Reset restores 2.10, 2.10, a $100 budget and decimal format.
2. Enter your odds and total budget
Choose decimal, American or fractional format. The arbitrage calculator with American odds accepts +150, -110 and even-money +100 or -100. Decimal odds must exceed 1; fractional odds must be a positive numerator divided by a positive denominator. Enter a total budget in cents between $0.01 and $1,000,000,000. CAD labels are display units only; all amounts must already use the same currency.
3. Compare the theoretical and practical results
The opportunity indicator uses the exact sum of reciprocal decimal prices. The large net result uses the smallest payout from the final cent allocations. Recommended stakes always sum exactly to the entered budget. The calculator finds the maximum possible minimum payout over whole-cent allocations, rather than independently rounding each ideal stake.
4. Read the arbitrage profit calculator carefully
Payout includes the stake returned by the winning outcome. Net profit subtracts the entire market budget, including stakes on losing outcomes. ROI divides that net profit by total stake. Money is displayed to two decimals, while the computation retains sub-cent payouts. Your sportsbook may round differently; tiny positive sub-cent amounts are not reliable usable profit.
Changing formats without changing the price
A format change keeps the authoritative odds as an exact ratio. American and decimal fields can show rounded representations for repeating values, but repeatedly switching formats preserves the original price unless you edit it. Fractional format shows the exact profit ratio. Invalid fields remain flagged until corrected.
Put the numbers into perspective.
Compare theoretical returns with a practical cent allocation.
Open the arbitrage calculator →