Professional Matched Betting Calculator 2026
Convert free bets into guaranteed profit with precision calculations
Free Bet Details
Odds Settings
Calculation Results
$34.34
Outcome Breakdown
Matched Betting Formulas
The mathematics behind free bet conversion
Lay Stake (SNR)
$50 free bet at 4.0/4.2: ($50 × 3) ÷ 3.99 = $37.59
Lay Stake (SR)
$50 SR bet at 4.0/4.2: ($50 × 4) ÷ 3.99 = $50.13
Guaranteed Profit
With SNR: $150 - $120.35 = $29.65
Retention Rate
$29.65 ÷ $50 = 59.3% retention
How Matched Betting Works
Get Free Bet
Sign up with a bookmaker and claim their free bet welcome offer. Most bookies offer $10-$200 in free bets for new customers.
Place Back Bet
Use your free bet to back a selection at the bookmaker. Choose higher odds (3.0+) for better retention rates.
Place Lay Bet
Lay the same selection at a betting exchange. This covers all outcomes so you profit regardless of result.
Lock In Profit
Whatever happens, you've extracted cash value from the free bet. SNR bets typically retain 60-80% of face value.
SNR vs SR Retention Comparison
How much profit you keep at different odds
| Odds | SNR Retention | SR Retention | SNR Profit ($50) | SR Profit ($50) |
|---|---|---|---|---|
| 2.0 | 47% | 95% | $23.50 | $47.50 |
| 3.0 | 63% | 95% | $31.50 | $47.50 |
| 4.0 | 71% | 95% | $35.50 | $47.50 |
| 5.0 | 76% | 95% | $38.00 | $47.50 |
| 6.0 | 79% | 95% | $39.50 | $47.50 |
| 8.0 | 83% | 95% | $41.50 | $47.50 |
Pro Tips
Use Odds Matching Sites
Sites like OddsMonkey and Profit Accumulator show close back/lay odds in real-time. This saves hours of manual searching and improves retention.
Higher Odds = Better Retention
Free bets converted at 4.0+ odds typically retain 75-85%, while 2.0 odds may only retain 50%. Always aim for odds above 3.0 when possible.
Mind the Liquidity
Ensure the exchange market has enough liquidity for your lay stake. Low liquidity means your bet may not match, or you'll get worse odds.
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Frequently Asked Questions
About Our Matched Betting Calculator
Our professional matched betting calculator helps you extract maximum value from bookmaker free bets and promotions. Whether you're converting welcome offers or reload bonuses, this tool calculates the exact lay stake needed for guaranteed profit regardless of outcome.
The calculator supports both SNR (Stake Not Returned) and SR (Stake Returned) free bets with automatic exchange commission adjustment. See your guaranteed profit, required liability, and outcome breakdown in real-time as you type. Pro mode lets you plan multiple conversions and track your matched betting journey.
Matched betting is a legal, risk-free way to profit from betting promotions. With typical retention rates of 60-80% on SNR bets and 85-95% on SR bets, you can convert $1000 in free bets into $600-800 real cash. Updated for 2026 with the latest exchange commission rates.
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Evgeny Volkov
Verified ExpertOver 10 years developing software for the gaming industry. Advanced degree in Mathematics. Specializing in probability analysis, RNG algorithms, and mathematical gambling models.