Matched Betting Calculator
The Monzenta Matched Betting Calculator helps you work out the stakes and potential outcomes for supported qualifying bets and free bets. Enter the bookmaker and exchange odds to calculate the relevant stakes and liability.
Before you use it
- You need the bookmaker back odds.
- You need the exchange lay odds for the equivalent market.
- Exchange commission affects the calculation.
- Lay liability is the amount you could lose on the exchange, not the amount you stand to win.
Gambling involves risk — you may lose money. Read our Gambling Risk Notice for support resources including GamCare.
Stake returned: the credited stake is returned along with winnings on a bookmaker win.
Leave this off to use Monzenta's penny-rounded equalising stake. Turn it on after placing the lay bet to see your real outcome figures.
Lay stake
£9.80
Lay liability
£30.38
Guaranteed conversion
£9.60
Conversion rate
96.0%
If the back bet wins
£9.62
Exchange liability £30.38
If the lay bet wins
£9.60
Exchange commission 2.00%
The tiny outcome difference is caused by rounding the recommended lay stake to the nearest penny. The full-precision equalising stake is 9.803922.
Accumulator legs
Enter legs in the order you expect to lay them. Each previous market must settle before the next lay is placed.
Leg 1
Not placedSuggested lay stake
Planned£8.89
Planned lay liability
Planned£9.78
Leg 2
Not placedSuggested lay stake
Planned£18.87
Planned lay liability
Planned£41.51
Settlement scenarios
Each scenario uses actual matched positions where recorded and planned positions for legs not yet matched. Results are estimates based on the odds and commission entered.
| Scenario | Bookmaker | Exchange | Net result | Basis / status |
|---|---|---|---|---|
| Loses at leg 1 | −£10.00 | £8.71 | −£1.29 | PlannedAvailable scenario |
| Loses at leg 2 | −£10.00 | £8.71 | −£1.29 | PlannedNot reached |
| All selections win | £50.00 | −£51.29 | −£1.29 | PlannedAvailable scenario |
Bankroll and exposure
Next planned lay liability
Planned£9.78
Liability already lost on earlier winning legs
£0.00
Future planned lay liabilities
Planned£41.51
Exchange bankroll required for the sequence
Planned£51.29
Total starting capital (including bookmaker stake)
Planned£61.29
The exchange bankroll figure is the cumulative liability funding required to reach the final planned leg (or the recorded losing leg if the sequence ends early). The bookmaker stake is separate. This is not a reading of your live exchange account balance.
Next action · Leg 1
Enter the actual values accepted by the exchange. Suggested values are prefilled for convenience; they are not evidence that a lay was matched.
Direct accumulator lay: if an exchange lists the exact same combined accumulator outcome, you can calculate that single back/lay pair in the Single bets tab using the combined odds. Monzenta does not confirm that an equivalent exchange market exists.
Check the exchange market first
This calculator only works when the exchange offers one market that matches your entire Bet Builder. The selections, combined market and settlement rules must all match.
Before using the calculated results:
- Check that the exact matching exchange market exists.
- Never try to hedge individual Bet Builder selections separately.
- Check both providers' rules for voids and settlement conditions.
Monzenta cannot verify market availability or confirm that two markets have identical settlement rules.
Changing either set of odds will require you to confirm again.
Use your own cash stake to place a combined Bet Builder on the sportsbook.
Leave this unchecked to use the recommended penny-rounded equalising stake. Check this after placing your lay bet to calculate real outcome figures.
Recommended lay stake
£9.65
Exchange lay liability
£40.53
Total upfront money required
£50.53
Qualifying loss
£0.54
Outcome difference
£0.01
If the Bet Builder wins (Bookmaker)
−£0.53
Exchange liability lost: £40.53
If the Bet Builder loses (Exchange)
−£0.54
Exchange profit after 2.00% commission
The minor outcome difference is caused by rounding the recommended lay stake to the nearest penny (£0.01). The unrounded equalising stake is 9.652510.
What this calculator doesn't do
The calculator helps you work out the numbers behind a matched bet, but it doesn't:
- Find bookmaker or exchange odds for you.
- Confirm that two selections or markets are equivalent.
- Verify offer eligibility or check individual promotional terms.
- Guarantee a profit or that a bet will settle as expected.
Single bets, accumulators and Bet Builders
Monzenta supports three types of matched betting calculations.
Single bets: One bookmaker selection matched against a corresponding exchange market.
Accumulators: Multiple selections combined into one bet, with calculations accounting for the individual legs.
Bet Builders: Multiple selections combined into one bookmaker price, calculated against one exact corresponding exchange market.
Each calculator uses a different approach. Always check that the bookmaker and exchange markets match and that their settlement rules are compatible.
Safer gambling
Betting offers are for people aged 18 or over. If gambling stops feeling under control, free confidential support is available from GamCare and BeGambleAware.
New to this? Read the guides in the Learning Centre.