Blended Odds Calculator
Combine multiple bets on the same market to calculate your blended odds and potential return across Sportsbook and Exchange bets. Use the calculator to understand your overall position when you have backed the same market at different prices, and keep a single blended entry in your betting log.
| # | Odds ▶ | Bet type ▶ | Stake ▶ | Net odds ◀ | Exchange BACK ◀ | Exchange LAY ◀ | Potential return ◀ |
|---|---|---|---|---|---|---|---|
| 1 | £ | 3.30 | 3.35 | 1.43 | £33.00 | ||
| 2 | £ | 3.94 | 4.00 | 1.33 | £29.55 | ||
| 3 | £ | — | — | — | — | ||
| 4 | £ | — | — | — | — | ||
| 5 | £ | — | — | — | — | ||
| TOTAL | Combined | £17.50 | 3.57 | 3.63 | 1.38 | £62.55 | |
How to use this tool
- Enter the odds and stake for each bet on the same market.
- Add a new row for each additional bet you want to include.
- The calculator will combine your bets and automatically calculate your blended odds, total stake and expected return.
- Use the blended position as a single reference for your overall position or betting log.
Frequently Asked Questions
What are blended odds in betting?
Blended odds represent the combined price of multiple bets on the same event and market when those bets were placed at different odds.
For example, if you place £10 at 2.00 Deciaml odds and another £10 at 2.20 on the same market, the two bets can be combined into a single position with a £20 total stake and blended odds of 2.10.
Use the calculator to combine your bets and see your overall position at a single blended price.
How are blended odds calculated?
Blended odds take both the odds and stake of each bet into account.
The calculator combines the returns from your individual bets and divides the total return by the total stake to calculate the blended odds. This means a larger stake has a greater influence on the blended price than a smaller stake.
Enter your individual bets into the calculator to automatically calculate the blended odds, total stake and potential return.
Why can't I just average the odds?
A simple average of the odds does not take the different stake sizes into account.
For example, a £100 bet at 2.00 Decimal odds and a £10 bet at 3.00 should not have the same influence on the combined price. Blended odds take the stake of each bet into account, so the result reflects your actual position.
Use the calculator when you want to combine your actual bets rather than simply average the odds.
Can I combine Sportsbook, Exchange Back and Exchange Lay bets?
Yes. The calculator can combine Sportsbook, Exchange Back and Exchange Lay bets when they represent positions on the same event and market.
For example, you might back a red card with a Sportsbook at 3.50 Decimal odds, then later find the same market on an Exchange at 5.00 (Back Yes), place an additional stake, and later Lay No at 1.20.
If the bets represent the same underlying position, you can enter them in the calculator to see your combined stake, blended odds and potential return.
How can blended odds help with bet tracking?
When you place multiple bets on the same event and market at different prices, it can be difficult to keep track of your overall position.
Blended odds let you combine those bets into a single position with one total stake and one blended price. This makes it easier to record the position in your betting log and understand your overall exposure and potential return.
Enter your individual bets into the calculator whenever you want to turn multiple entries into a single blended position.
What Exchange commission rate should I use in this tool?
Use the commission rate that applies to your Exchange account. The default setting is 2%, but you can change it in Settings.
Exchange commission is usually charged on net winnings or profit rather than on your stake. The exact rate and commission rules depend on the Exchange and your account.
Does this calculator work with Exchanges other than Betfair?
Yes. The core blended odds calculation works with any betting Exchange.
Enter the odds and stakes from your bets and the calculator will calculate the combined position. If you use an Exchange with a different commission rate, update the Exchange commission in Settings.
Formulas
Let N = nominal odds, S = stake, c = 0.02 = exchange commission.
- • Sportsbook → R = N
- • Exchange − Back → R = (N − 1)·(1 − c) + 1
- • Exchange − Lay → R = (N/(N−1) − 1)·(1 − c) + 1 (convert lay to back equivalent on the opposite outcome, then apply commission)
- • Exchange BACK (gross) B = (R − 1)/(1 − c) + 1
- • Exchange LAY (opposite outcome) L = B/(B − 1)
- • Winnings (return on full win) W = S · R
- • Total stake = Σ Sᵢ (active rows only)
- • Total winnings = Σ Wᵢ
- • Blended real odds R* = Total winnings / Total stake (stake-weighted)
- • Blended Exchange BACK B* = (R* − 1)/(1 − c) + 1
- • Blended Exchange LAY L* = B*/(B* − 1)
- • Bet type = single source if all rows share one type, else "Combined"
Information only. Check all calculations before placing bets. Odds and market conditions may change. Bet Tools HQ accepts no responsibility for losses arising from reliance on these results.