How to use the arbitrage calculator
- Enter the best odds for Team A at one sportsbook and the best odds for Team B at another. Any format works.
- For three-way markets — a Bo2 that can end 1–1 — add the draw odds too.
- Enter your total stake.
You'll see the combined implied chance, how much to stake on each outcome and the guaranteed profit (or loss).
Example
A Valorant match: Book 1 offers Team A at 2.10, Book 2 offers Team B at 2.05. Total stake $100:
| Team A (2.10) | Team B (2.05) | Total | |
|---|---|---|---|
| Implied chance | 47.62% | 48.78% | 96.40% |
| Stake | $49.40 | $50.60 | $100.00 |
| Return if it wins | $103.73 | $103.73 |
Whoever wins, you get back $103.73: a $3.73 profit, or 3.73% on your stake.
When is it an arbitrage?
| Odds A | Odds B | Combined | Result on $100 |
|---|---|---|---|
| 2.10 | 2.05 | 96.40% | +$3.73 |
| 2.10 | 2.10 | 95.24% | +$5.00 |
| 2.00 | 2.00 | 100.00% | $0.00 |
| 1.95 | 1.95 | 102.56% | −$2.50 |
The normal case is over 100%: that's just the combined bookmaker margin. Measure a single book's margin with the margin calculator.
Esports-specific traps
- Settlement rules: one book may settle on the series including overtime, another may void the bet if a team forfeits or plays with a stand-in. Read both rule pages.
- Map vs match markets: "Map 1 winner" and "Match winner" are different markets — never mix them in one arbitrage.
- Fast-moving lines: esports odds jump on roster news, and live odds change between rounds. Place first the bet most likely to move or be limited.
- Limits: stake limits on esports markets are often low, especially in smaller leagues.
Example: a CS2 map winner
Two sportsbooks disagree on a CS2 map. Book A offers 1.95 on Team 1 and Book B offers 2.10 on Team 2. You have $200.
| Value | |
|---|---|
| Combined implied chance | 51.28% + 47.62% = 98.90% |
| Stake on Team 1 (Book A) | $103.70 |
| Stake on Team 2 (Book B) | $96.30 |
| Return whichever wins | $202.22 |
| Guaranteed profit | $2.22 (1.1%) |
That is a tiny margin, and typical for real arbitrage. Esports lines move quickly, and map markets can close between rounds or after a pistol round, so the second bet is the risky one: place the bet most likely to move first and check each book's limits.
Because the margin is small, one voided bet, a rule difference or a stake limit can turn the profit into a loss. See the traps above before you try it with real money.
Before you start, check whether esports betting is legal where you live. To protect a winning bet instead of arbitraging from scratch, see the hedge calculator.
