Patent Calculator

Seven bets, three selections

A Patent is three singles, three doubles and one treble. At £1 a bet it costs £7, or £14 each way. It is a Trixie with the three singles added, which is the whole point: a Trixie returns nothing unless two selections win, while a Patent pays something back off one.

It is the smallest full-cover bet that includes singles, which makes it the natural starting point if you like the idea of a Lucky 15 but want to risk £7 rather than £15.

Worked example

Three selections at decimal odds of 2.50, 3.00 and 4.00, £1 per bet, so £7 staked.

• All three win: £69 back — £62 profit.
• One wins (the 2.50): £2.50 back, a £4.50 loss. The single softens it; it does not save it.

Unlike a Lucky 15, a Patent has no consolation or all-winners bonus. Bookmakers do not usually attach them to this bet, so the calculator leaves those controls off. If yours does offer one, switch the bet type to Lucky 15 to model it.

Patent, Trixie or three singles?

These are the three ways to back the same three selections, and they suit different expectations.

• Three singles (£3): no multiples, so no compounding. The lowest variance and the smallest ceiling.
• Trixie (£4): multiples only. Needs two winners to return anything, and pays more than a Patent when they arrive because none of your stake sat on singles.
• Patent (£7): both. You pay for the safety net.

Put the same odds into the calculator above and switch between Patent, Trixie and Single in the bet type dropdown to see the difference for your own selections.

Non-runners

Mark a selection void and it settles at odds of 1.00: its single is refunded, the two doubles containing it become singles on the other selection, and the treble becomes a double. That is exactly how a bookmaker settles a withdrawn runner, and it is the case people most often get wrong on paper.

A Patent applies the bookmaker’s margin to seven bets instead of one. Wider cover costs more than it returns over time. 18+ only. Please gamble responsibly.