Normal matched betting calculator
Standard back and lay calculator for qualifying bets, free bets and risk free offers with underlay, standard and overlay modes.
Calculators
Free matched betting calculators
Use these betting calculators to size your stakes, check lay liability and understand the profit or qualifying loss before you place a matched bet. The free web tools cover normal back and lay bets, SNR free bets, unwanted lays, multi-lay positions, profit boosts and odds conversion.
Free bet calculator
Calculate SNR free bet lay stakes, exchange liability and retained profit from bookmaker free bet offers.
Unwanted lay calculator
Work out the correct back stake when you have an exchange lay you no longer want and need to neutralise the position.
Multi lay calculator
Split a lay stake across multiple outcomes and see your profit lines for every scenario. Supports normal and free bet modes.
Profit boost calculator
Convert a bookmaker boost percentage into boosted decimal odds using the profit boost formula.
Odds conversion calculator
Convert fractional odds to decimal odds and scan a chart of common UK prices before using a calculator or exchange.
Sequential lay calculator
Calculate each lay stake when hedging an accumulator one leg at a time, including free bet accas and liability checks.
Early payout calculator
Model a 2UP position after early payout, including lay liability, exchange trade-out stake and outcome profit.
New to the maths? Start with back and lay bets explained, then read qualifying loss explained, or read the 2UP matched betting guide if you are checking early payout positions, or sequential laying explained if you are working with accumulator legs .
Calculator availability
BYB keeps the essential public calculators free. Some specialist calculators are better used inside the separate PocketProfit app or alongside BYB Premium support because they depend on the exact offer, position or question being checked.
Matched betting calculatorFree web calculator
Free bet calculatorFree web calculator
Unwanted lay calculatorFree web calculator
Multi-lay calculatorFree web calculator
Profit boost calculatorFree web calculator
Odds conversion calculatorFree web calculator
Sequential lay calculatorFree web calculator
2UP calculatorUse early payout calculator
Early payout calculatorFree web calculator
Which matched betting calculator should I use?
These matched betting calculators are designed to remove the maths and help you check the numbers before placing a bet. Use the matched betting calculator for standard back and lay bets, the free bet calculator for SNR offers, the unwanted lay calculator to fix exchange mistakes and the multi lay calculator when you need to split a lay across several outcomes. The sequential lay calculator is for accumulator legs that settle one after another, while the early payout calculator is for 2UP trade-out checks after an early payout has triggered.
Normal matched betting calculator
The normal calculator works out your lay stake, liability and qualifying loss for any back and lay combination. It supports free bets, risk-free bets and underlay or overlay approaches for 2UP trading. This is the core calculator used in matched betting and is essential for welcome offers and reloads.
Free bet calculator
The free bet calculator is focused on stake not returned free bets. It calculates the lay stake and liability, then shows the profit retained from the bookmaker free bet after the exchange side is accounted for.
Unwanted lay calculator
Mistyped a stake, took the wrong odds or changed your mind after laying? The unwanted lay calculator tells you exactly how much to back to neutralise the exchange position. It calculates the correction bet required and shows your totals whether the back or lay side wins.
Multi lay calculator
This tool lets you split a single lay position across multiple outcomes (ideal for horse racing or multi-way markets) and see your profit lines for every scenario. It supports normal and free bet modes and matches the multi-lay logic built into PocketProfit.
Profit boost calculator
The profit boost calculator converts an advertised bookmaker boost into boosted decimal odds. Enter the original back odds and boost percentage to see the adjusted price before checking the offer or logging the bet.
Why use Back Yourself Betting calculators?
- Maths consistent with companion tracking tools such as PocketProfit
- Fast, accurate and built for real matched betting use cases
- Handles free bets, overlays, underlays, risk-free offers and corrections
- Clear outcomes for every scenario so you avoid mistakes
- Perfect for welcome offers, reloads, boosts and 2UP trading
Want more than calculators?
BYB Premium adds the Sign Up Cycle, the BYB oddsmatcher, reload alerts through Discord, supported PocketProfit logging links and Discord support around these tools, so beginners can learn the method with more structure and less manual tracking.
These calculators support the wider BYB learning system and common tracking habits used by the community.