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The Bonus Box
Bet Calculator
Calculate your exact Net Profit and Total Stake instantly whether you are backing a simple Single or building a massive Super Goliath. Built for total clarity, our interactive engine handles the complex scenarios that basic tools miss:
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Rule 4 & Dead Heat Adjustments: See exactly how deductions or tied finishes impact your returns.
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Each Way Logic: Instantly calculate win and place parts for multiples.
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Fractional & Decimal Support: Switch between odds formats to suit your strategy.
How to Use The Bonus Box Free Bet Calculator Odds & Profit Tool
Follow these simple steps to calculate your potential winnings in seconds:
Step 1: Select Your Bet Type
Choose from 21 different options, including Singles, Lucky 15s, or Goliaths.
Step 3: Enter Your Stake
Type in your unit stake
(the amount you want to bet per line).
Step 5: Enter Selection Details
Input the odds for each horse and select the result
(Win, Place, Void, or Lose).
Step 2: Choose Odds Format
Toggle between Fractional (e.g., 5/1) or Decimal
(e.g., 6.0) depending on your preference.
Step 4: Check Your Conditions
If your bet is Each Way, subject to Rule 4, or involved in a Dead Heat, tick the relevant boxes to update the math.
Step 6: Calculate
View your Total Stake, Total Returns, and Net Profit instantly at the bottom of the screen.
What is a Bet Calculator?
A bet calculator is designed to answer one of the biggest questions in sports betting: how much will I win? This easy to use tool gives you an insight into your potential profitswhen betting at a sportsbook. Use The Bonus Box Free Bet Calculator Odds & Profit Tool to set your desired price and stake, and see what you could win if you find the right market. You can flick between numerous bet types from simple singles to complex multiples and find a bet level that’s right for you. The Bonus Box calculator covers all bet types and conditions that you’ll find across our site. Use the betting calculator below to discover your potential profits and read on to learn more about Rule 4, Each Way, Dead Heat, and everything else you should know before betting!
Why Use a Bet Calculator?
Accuracy
Manually calculating the returns on a Lucky 63 or a Heinz involves hundreds of mathematical steps, a calculator ensures you get the exact figure every time.
Strategy Comparison
It allows you to quickly see the difference in profit between a €10 Single and a €1 Yankee, helping you manage your bankroll more effectively.
Handling Variables
It takes the guesswork out of complex adjustments like Rule 4 deductions or Each Way place terms, showing you exactly how much the bookmaker owes you.
What is Rule 4?
​Rule 4 is a recalculation of your bet if a major favorite pulls out before an event. It is most common in horse racing, if a short odds runner withdraws, the remaining odds are theoretically inaccurate. Rule 4 applies a deduction formula to shorten everyone else's odds accordingly. You can toggle Rule 4 in our calculator to see your true return should this be enacted.
What is Each Way?
​An Each Way (E/W) bet is essentially two equal bets rolled into one: a "Win" bet and a "Place" bet. For example, a €5 Each Way bet will actually cost your bankroll €10. The first €5 goes on your selection to win the race outright, and the remaining €5 goes on it to "place" (finish in the top 2, 3, 4, or sometimes 5 positions, depending on the number of runners and the bookmaker's terms). If your horse wins, you get paid out on both parts of the bet for a maximum return. If your horse doesn't win but still manages to finish in a place position, the Win portion of your bet loses, but the Place portion still pays out at a fraction of the original odds (typically 1/4 or 1/5). It is a fantastic strategy for backing horses at longer odds, giving you a safety net to secure a return even if they narrowly miss out on first place.
What is Dead Heat?
A dead heat occurs when multiple selections win the same event simultaneously. If a single winner cannot be determined (e.g., a photo finish where three horses cross the line at once), winnings are divided by the number of winners. A two-way dead heat results in 50% of the winnings, while a three-way tie results in 33%. Our calculator features a Dead Heat (DH) dropdown to handle these specific scenarios.
Master List: Types of Bets
Our calculator supports everything from a simple "Single" to the most massive "Super Goliath"
Single: A bet on one outcome.
Double / Treble: All selections must win for the bet to pay out.
Accumulator: Multiple selections combined into one single bet.
Trixie: 4 bets: 3 doubles and 1 treble.
Yankee: 11 bets: 6 doubles, 4 trebles, and 1 fourfold.
Patent: 7 bets: 3 singles, 3 doubles, and 1 treble.
Lucky 15: 15 bets: 4 singles, 6 doubles, 4 trebles, 1 fourfold.
Heinz: 57 bets: 15 doubles, 20 trebles, 15 fourfolds,
6 fivefolds, 1 sixfold.
Goliath: 247 bets: 28 doubles, 56 trebles, 70 fourfolds,
56 fivefolds, 28 sixfolds, 8 sevenfolds, 1 eightfold.
Super Goliath: 255 bets: Adds 8 singles to the standard Goliath structure.​​