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Bonus Bet Conversion Calculator

The Betstamp Bonus Bet Conversion Calculator tells you exactly how much to hedge a bonus bet to lock in guaranteed profit. Enter your bonus bet amount, the odds of the side you're betting with the bonus, and the odds available on the opposite side at a different sportsbook — the calculator returns the optimal hedge stake and your guaranteed profit.

How to Use the Bonus Bet Calculator

1. Enter your Bonus Bet Amount (e.g., $50)
2. Enter your Bonus Bet Odds (the odds of the side you're using the bonus bet on)
3. Enter your Hedge Odds (the odds available on the opposite side at a different sportsbook)
4. Choose your odds format (American, Decimal, Fractional)
5. The calculator returns:
• Hedge Stake: how much cash to bet on the opposite side
• Guaranteed Profit: your locked-in profit regardless of outcome

What is a Bonus Bet?

A bonus bet (also called a "free bet") is a promotional wager given by a sportsbook. Unlike a regular bet, if a bonus bet wins, you receive the winnings only — not the original stake amount.

Example: $50 bonus bet at +200. If it wins, you collect $100 profit (not $150 total — the stake is kept by the book). If it loses, you lose nothing but also get nothing.

This "winnings only" structure means the real value of a $50 bonus bet is typically only 60–80% of its face value — which is why hedging it is essential to extract maximum value.

How to Convert Bonus Bets to Cash

The standard hedge workflow:

1. Receive a bonus bet at Sportsbook A (e.g., $50)
2. Find a two-sided market (a game line works fine — use higher odds for better conversion)
3. Place the bonus bet on one side at Sportsbook A (typically the higher-odds side)
4. Use the Betstamp Bonus Bet Calculator to find the optimal hedge amount
5. Place a cash hedge on the opposite side at Sportsbook B
6. Regardless of outcome, collect guaranteed profit

Worked example: $50 bonus bet on Team X at +250. At Sportsbook B, Team Y (the opposing side) is available at –240.

• Enter inputs into the calculator
• It returns the exact hedge stake and your locked-in guaranteed profit

Bonus Bet Conversion: Why Higher Odds Win

Counterintuitively, bonus bets placed on higher-odds lines (+200 or more) convert at higher rates than bets placed on near-even lines. The "winnings only" structure of bonus bets means you want to maximize potential winnings — which means higher odds.

Practical rule:

• Bonus bet on –110 line: ~50% conversion (hedging costs most of the value)
• Bonus bet on +200 line: ~65–75% conversion
• Bonus bet on +500 line: ~80%+ conversion

The tradeoff is variance in when you capture that value. Higher-odds hedges require bigger cash outlays to lock in the guarantee, and the final profit skews toward the sportsbook where you placed the cash hedge rather than the bonus-bet side.

Where Bonus Bets Come From

Common sources:

• Sportsbook welcome offers. Signup promos at new sportsbooks are the biggest source. Betstamp tracks current offers in the Sportsbook Reviews section.
• Loss-rebate promos. "Bet $X, get Y back as a bonus bet if you lose."
• Boosted odds promotions. Occasionally overlap with bonus bets if the bet is structured as a free/bonus stake.
• Loyalty and VIP rewards. Ongoing bonuses for active bettors at most major books.

Risks to Know

• Line movement between bets. If the hedge line moves between placing your bonus bet and placing the cash hedge, your guaranteed profit shrinks or disappears. Place both bets as fast as possible.
• Same-book hedging. Some sportsbooks flag bettors who hedge within a single book. Use different sportsbooks for the bonus bet and the cash hedge.
• Bonus bet restrictions. Some bonus bets are restricted (can't be placed on certain markets or odds ranges). Read the terms before building your hedge plan.

Bet void scenarios. If a leg gets voided, your hedge may leave you exposed. Rare, but worth knowing about.

With Betstamp PRO—the most advanced top-down betting odds screen in the market. Bettors will find hundreds of daily betting edges with ease, allowing you to scale your profits long-term. Click the banner to book a free demo.