All-in-one Pro Calculator
Surebet, matched betting, freebet, dutching and same-book trading combined in one multi-currency tool.
Pro Calculator
All options accessible — fine-tune every parameter yourself
| Label | B/L | Odds | Bookmaker | Stake | D | L | Profit | |
|---|---|---|---|---|---|---|---|---|
| 1 | 0.00€ | |||||||
| 2 | 0.00€ | |||||||
| Total stake | 0.00 | |||||||
💎 The all-in-one
This calculator replaces 5 other tools
Click the tab that matches your need, unnecessary options are hidden
Classic surebet
2 to 10 backs at different bookmakers. All your profits guaranteed.
Matched betting
1 back + 1 lay to convert your qualifying freebet.
Freebet → Cash
Convert a stake-not-returned freebet into guaranteed cash via a lay.
Dutching
Spread the stake across several outcomes, target the winning ones.
All-in-one
All parameters accessible for the trickiest cases.
📚 Full guide
How to use the Pro Calculator
The most complete tool — master the 5 modes and all options
💎What is the Pro Calculator?▼
The Pro Calculator brings together everything you need for mathematical betting in a single tool: arbitrage (surebet), matched betting, freebet conversion, dutching and complex combinations. It replaces 5 separate calculators.
You pick a mode via the tabs at the top. Each mode shows only the useful options, so you won't drown in settings you don't need. The All-in-one mode unlocks absolutely every parameter.
📖Concepts to know▼
Back (bet FOR)
The classic bet: you bet that an outcome will happen, at a regular bookmaker (Bet365, Betclic...).
Lay (bet AGAINST)
On an exchange (Betfair, Smarkets), you bet that an outcome will NOT happen. This is the basis of matched betting.
Liability
On a Lay bet, the amount you actually risk if the bet wins. This is what must be available in your exchange account.
RTP (Return To Player)
The % redistributed across all odds. Above 100% = surebet (guaranteed profit). Below = average loss.
Commission
Exchanges take a commission on winnings (often 2 to 5%). The effective odds account for it. The OrbX button applies 3% in one click.
🧩The 5 modes in detail▼
🎯 Surebet (arbitrage)
Enter 2 to 10 Back odds at different bookmakers for the same event. If the RTP exceeds 100%, it's a surebet: spread your stakes and win no matter what.
🔄 Matched betting
Two bets: 1 Back at the bookmaker + 1 Lay on the exchange, at the same odds. Used to clear a qualifying freebet with minimal loss. Enter the exchange commission.
🎁 Freebet → Cash
Got a freebet (stake-not-returned)? Enter its value, the back odds and the lay odds. The tool calculates the Lay stake to place to convert that freebet into guaranteed cash, with a table of both scenarios.
⚖️ Dutching
Spread your stake across several outcomes to target an equal profit whatever the winning outcome. Tick in D the outcomes you want to distribute the profit on.
💎 All-in-one
Every parameter unlocked: back/lay per row, multi-currency, commissions, targeted distribution, locking. For the most complex setups.
⚙️Advanced options▼
Total stake / Target profit
Choose whether you start from a total budget to stake, or a profit you want to reach — the tool computes the other.
Locking (radio L)
Fix the stake of a specific row (already placed), the tool recalculates all the others around it.
Distribution (D box)
Choose which outcomes to spread the profit on. Unticked outcomes are neutral (coverage without targeted gain).
Multi-currency
Each row can be in a different currency. Set the exchange rates and the tool converts everything into your main currency.
Rounding
Round stakes (0.10, 0.50, 1, 2, 5) for realistic amounts. Option to round in the main currency then convert.
🔢Step-by-step guide▼
Choose your mode via the tabs (Surebet, Matched, Freebet, Dutching or All-in-one)
Set the number of outcomes (market) and the formula if needed
Enter your odds, and the bookmaker/exchange for each row
Enter your stake (total) or your target profit
Read the verdict, the placement order and the exact stakes — then export or copy the image
Pro tips
📌 In surebet, always place the stake on the highest odds first (it moves the fastest)
📌 Enable commissions as soon as you use an exchange, otherwise your calculation is wrong
📌 An RTP between 99 and 100% is ideal for matched betting (near-zero loss)
📌 Always check your odds if the ROI seems too good — it's usually an input error
📌 Rounding can eat into your profit: watch the displayed warning
📌 Locking is perfect when a bet is already placed and you're calculating the hedge