Arbitrage Calculator

Explore arbitrage concepts by calculating potential opportunities between sportsbooks. Enter odds from two books to understand how arbitrage works.

Side 1 Odds (American)

Side 2 Odds (American)

Total Stake ($)

Disclaimer: This calculator is for informational and educational purposes only and does not guarantee any specific outcome. All bets carry risk. Please gamble responsibly and within your means. Final odds and payouts should always be verified with your sportsbook.

What is Arbitrage Betting?

Arbitrage betting exploits differences in odds between sportsbooks to guarantee profit regardless of outcome. When the combined implied probability is less than 100%, an arb exists.

Note: Arb opportunities are rare and close quickly. Having accounts at multiple sportsbooks is essential for arb betting.

Related Guides

Palpable Error Hunting

Find obvious pricing mistakes and understand void risks

The Art of Middling

Win both sides when lines move in your favor

Arbitrage & Hedging Guide

Master risk-free betting strategies

This calculator is for informational and educational purposes only. Results should be verified with your sportsbook before placing any wagers. All betting carries risk. Full Disclaimer

How to Use This Calculator

1
Enter Side 1 Odds: Input the best American odds you found for one outcome (e.g., +150 at DraftKings)
2
Enter Side 2 Odds: Input the best odds for the opposite outcome from another book (e.g., -140 at FanDuel)
3
Set Total Stake: Enter how much total you want to wager across both bets
4
Check for Arbitrage: If combined implied probability is under 100%, you have an arb opportunity

Frequently Asked Questions

What is arbitrage betting (arbing)?

Arbitrage betting exploits price differences between sportsbooks to guarantee profit. When the combined implied probability of both sides of a market is less than 100%, you can bet both outcomes and profit regardless of the result. This requires accounts at multiple sportsbooks to find these opportunities.

How do you find arbitrage opportunities?

Arbs occur when different sportsbooks have significantly different odds on the same event. Use odds comparison tools to find the best price on each side. If Side A at +150 (40% implied) and Side B at -130 (56.5% implied) = 96.5% total, you have a 3.5% arb.

Are arbitrage bets legal?

Yes, arbitrage betting is legal. However, sportsbooks don't like arbers and may limit or ban accounts that consistently arb. To avoid detection, mix in regular bets, round your stakes, and don't always take the maximum odds.

How much can you make from arbitrage betting?

Typical arb margins are 1-5%. On $1,000 total stakes, that's $10-50 profit per arb. The challenge is finding opportunities and avoiding account limitations. Many arbers make $500-2,000/month, though this requires significant capital and multiple accounts.

What is the difference between arbitrage and hedging?

Arbitrage finds guaranteed profit by exploiting odds differences BEFORE an event. Hedging locks in profit AFTER you've already placed a bet and conditions have changed (like a futures bet gaining value). Both guarantee profit, but the timing and strategy differ.