Oddsmart Single Bet Calculator
Matched betting is all about turning bookmaker offers into guaranteed profits by covering all outcomes on betting exchanges.
Yet even the simplest single bet can involve multiple numbers—stakes, odds, liability, and expected returns. A single miscalculation can wipe out your carefully planned margin.
That’s where the Oddsmart Single Bet Calculator comes in, offering instant, precise computations to help UK matched bettors stake correctly, estimate returns and lock in profit.
In our single bet calculator guide below, you may learn:
Oddsmart Single Bet Calculator
Results
Lay Stake: £0.00
Liability: £0.00
Profit if Back Wins: £0.00
Profit if Lay Wins: £0.00
- What a single bet calculator does and why it’s essential for matched betting
- Step-by-step usage instructions, for maximum efficiency
- The maths behind the bet calculator tool—broken down in plain English
- How to accurately switch between UK, US and Decimal Odds
- Best-practice advice to use our bet calculator for single bets
- Advanced matched betting tips to supercharge your workflow
What Is a Single Bet Calculator?
Our Single Bet Calculator automates the key arithmetic involved when placing a matched single bet: calculating how much to back with a free bet or funds, how much to lay on an exchange, and what your guaranteed profit will be, regardless of the outcome.
Key advantages of using our sports betting calculator:
- Accuracy: Eliminates human error in decimal and fractional conversions.
- Speed: Instant results—no spreadsheet juggling.
- Clarity: Displays back stake, lay stake, liabilities and profits side by side.
- Flexibility: Works with free bets, bonus bets, stake-recoverable bets and cash bets.
In matched betting, small edges become consistent profits. A reliable bet calculator ensures those edges aren’t eaten by rounding mistakes or mis-keyed figures.

Why Use Oddsmart’s Single Bet Calculator?
- Matched-Betting Focused: Includes options for stake back, stake not returned, bonus bet and cash stake scenarios.
- Multi-Format Odds: Accepts Decimal, Fractional and American odds.
- Profit Breakdown: Shows profit if back wins, profit if lay wins, net liability, and break-even stakes.
- User-Friendly UI: Clean interface with on-hover explanations of each field.
- Seamless Integration: Syncs with your Oddsmart account and bet tracker.
These features combine to give you complete control over every single bet.
Step-by-Step Guide: Using the Oddsmart Single Bet Calculator
Select Bet Type
Choose between cash stakes (your own money) or bonus bets (non-stake returned).
Enter Back Odds
Input the odds you intend to place with the bookmaker. Supports decimal (e.g. 3.5), fractional (e.g. 5/2) or American (+250).
Input Lay Odds
Add the exchange odds where you’ll lay the bet.
Specify Lay Commission
Typical UK exchanges charge 2–5% commission on winnings—enter your rate here.
Set Your Stake
For cash bets, this is the amount you’ll back. For bonus bets, input the value of the free bet.
Calculate
Click ‘Calculate’ to generate: Stake to Lay: Exact amount to place on the exchange. Liability: Maximum amount you risk if the lay wins. Profit Scenarios: Guaranteed profit whether back or lay wins.
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Underlying Bet Calculators Formulas Explained
Understanding the mechanics helps you trust the numbers. Here are the core formulas used
Stake to Lay (Cash Bet)
Liability (Cash Bet)
Profit if Back Wins (Cash Bet)
Profit if Lay Wins (Cash Bet)
Stake to Lay (Bonus Bet)
Profit if Back Wins (Bonus Bet)
Profit if Lay Wins (Bonus Bet)
Real-Life Example: Turning a Free Bet into Cash Profit
Imagine you’ve received a £20 free bet from a bookmaker. You find a suitable market with Back Odds of 4.0 (3/1) and lay it on an exchange at Lay Odds of 4.2, with a 2% commission.
- Enter Values:
- Bet Type: Bonus Bet
- Back Odds: 4.0
- Lay Odds: 4.2
- Commission: 2%
- Stake: £20
- Calculator Output:
- Lay Stake: £20 × 4.0 × 0.98 ÷ (4.2 – 0.02) ≈ £19.42
- Liability: £19.42 × (4.2 – 1) ≈ £63.24
- Profit if Back Wins: (4.0 – 1) × £20 = £60
- Profit if Lay Wins: £19.42 × 0.98 ≈ £19.03
Regardless of the outcome, you lock in a profit between £19.03 and £60.
Advanced Single Bet Matched Betting Tips
Odds Comparison
Use oddsmatcher tools from Oddsmart to find the best back and lay odds, maximising profit margins.
Bank Management
Divide your betting bank into regular, free bet and promotional segments for clearer tracking.
Bet Tracker
Log each single bet with stake, odds and outcomes to refine your strategy over time.
Automation
Use Oddsmart’s software to auto-populate calculator fields from saved markets.
Mobile Alerts
Enable push notifications for market shifts—react quickly to odds changes.
Ready to Revolutionise Your Betting Slips?
Visit Oddsmart.co now and start your free trial.
Discover how simple, fast and accurate multi-bookmaker slip building can be. Your next big win could be just a few clicks away.

Popular Single Bet Calculator FAQs
What’s the difference between cash bets and bonus bets in the calculator?
Cash bets return your stake and profit; bonus bets return profit only. The calculator adjusts formulas accordingly.
Why do I need to factor in exchange commission?
Exchanges deduct a percentage from winnings; accounting for commission ensures accurate stake and liability figures.
What if I enter the wrong lay odds?
Yes—the tool converts fractional odds (e.g. 5/2) into decimal internally for precise calculations.
Can I subtract commission directly in the lay odds?
Simply correct the input—results update in real time. Always double-check before placing bets.
How do dead heats or voids affect arbitrage?
Yes—Oddsmart respects user privacy and does not store personal data when using the calculator.
Do I need an Oddsmart account to use the calculator?
No—our calculator is free to use.
What if my profit margins are very small?
Small margins can be sensitive to rounding. Use Oddsmart’s high-precision mode to ensure accuracy to the penny.