A decimal price of 1000.00 means a hypothetical total return of 1,000 units from a one-unit cash stake if the bet wins in full. That includes the original unit: the profit would be 999 units. It does not mean the bet is safe, profitable in the long run or due to win.
This is a calculation guide, not a list of today's selections. For dated cards, use the mega accumulator page and check its actual price and timestamp. A page name is not a promise that the available card is exactly 1000.00.
1000.00, 1000/1 and +1000 are different prices
Read the odds format before calculating a return. In the following hypothetical examples, the stake is one cash unit, every active leg wins and there are no deductions, free-bet conditions or payout restrictions.
| Displayed price | Decimal equivalent | Total return | Profit |
|---|---|---|---|
| 1000.00 decimal | 1000.00 | 1,000 units | 999 units |
| 1000/1 fractional | 1001.00 | 1,001 units | 1,000 units |
| +1000 American | 11.00 | 11 units | 10 units |
The arithmetic uses decimal return = stake × decimal price, fractional-to-decimal = numerator ÷ denominator + 1, and positive-American-to-decimal = price ÷ 100 + 1. The examples are deliberately currency-neutral; a unit is a calculation input, not a recommended stake.
How an accumulator reaches a large price
For an ordinary multiple quoted by multiplying its decimal leg prices, ten selections at 2.00 produce 2 to the power of ten: 1024.00. Three hypothetical selections at 10.00 each produce 1000.00. These are arithmetic examples, not a proposed way to build a card.
There is no required number of selections that makes a 1000.00 accumulator sensible. Increasing the number of conditions does not make the requirement that all must succeed easier. William Hill's ordinary accumulator rules require every selection to succeed for a return, with separate treatment when a leg becomes void (William Hill's multiple-bet rules).
Do not multiply same-match selections and assume the bookmaker will accept the result. William Hill excludes related contingencies from ordinary multiples; its example pairs a team's exact-score win with that same team winning (related-contingency rules). A separately quoted bet builder needs its actual combined price.
What the 0.1% figure does and does not say
The price-implied probability calculation is 1 ÷ 1000 × 100 = 0.1%. This is the reciprocal of a price, not an independently measured chance of the card winning. It does not establish that a bookmaker's price is fair or that the selections have been assessed correctly.
As a separate mathematical illustration, ten genuinely independent events with a true 50% chance each would all occur with probability 0.5 to the power of ten: 0.09765625%. Those assumptions are essential. Real football selections can share dependencies, and a quoted price of 2.00 does not prove a true 50% chance.
Even under that hypothetical model, a losing sequence does not make the next independent attempt due to win. Read price-implied probability, why accumulators lose and correlation in bet builders before treating a large payout as evidence of value.
A void leg changes the calculation
Imagine three independent-match selections priced at 10.00 each. Their displayed product is 1000.00, but one leg is later declared void. Under the ordinary remaining-selection treatment in William Hill's rules, the two active 10.00 legs form a 100.00 double instead.
For a hypothetical one-unit cash stake, that is a 100-unit total return if both remaining legs win, not 1,000 units. This illustration assumes the operator applies that void rule; it does not predict how a particular postponement, promotion or player market will be settled.
A postponement and a void are not interchangeable labels. Read the void-leg guide and the rules attached to the actual bet. Keep the accepted slip rather than relying on a screenshot of an earlier quote.
Five checks before accepting a quoted return
- Confirm the odds format and recalculate with the accumulator calculator. Keep total return separate from profit.
- Check every fixture date, market and settlement period. The first kickoff is not necessarily the day the whole card finishes.
- Check the final accepted price. A saved card or an earlier page view is not a guarantee that the same price remains available.
- Read the operator's applicable payout limits, void rules and any promotion conditions. Do not substitute a competitor's rules for those on your own slip.
- Decide whether to stop. A round target such as 1000.00 is not a reason to add another selection or increase a stake.
Free-bet returns need their own calculation. William Hill states that its free-bet token stake is not returned in the same way as a normal cash stake (estimated-return rules). Check the precise promotion rather than applying the cash examples above.
Do not confuse published winners with a proven edge
A screenshot of a winning card omits the surrounding losses and unresolved bets. Inspect the site's descriptive results analysis, including its short sample, repeat-publication rules and pending outcomes. It is not proof of a profitable strategy.
There is no guaranteed accumulator on this site. If the purpose of the next bet is to recover a loss, stop: GambleAware advises setting limits in advance and walking away when that limit has been lost (GambleAware's advice).
Use the complete acca checklist if any detail remains unclear. Choosing not to place the bet remains an option, even after completing every calculation.
Frequently asked questions
What does 1000 odds mean?
Check the format. Decimal 1000.00 represents a 1,000-unit total return from a winning one-unit cash stake before deductions or special conditions. Fractional 1000/1 is decimal 1001.00; American +1000 is decimal 11.00.
How do I calculate accumulator odds?
For an ordinary multiple priced by multiplying its decimal leg prices, multiply those prices together. Then multiply by the cash stake for the hypothetical total return. Use a bookmaker's actual combined quote for a same-match builder.
Does 1000 odds mean a guaranteed win after 1,000 attempts?
No. The 0.1% figure is a reciprocal-price calculation, not a verified true probability or a timetable for a win. Previous losses do not make a hypothetical independent event due to occur.