Patent Bet Calculator: 7 bets on 3 selections

A Patent is seven bets on three selections: three singles, three doubles and one treble. Because it includes singles, one winner returns something.

18+. A calculator shows what a bet would return, not how likely it is to win. Set a budget before you bet. Free help: GamCare (UK, 0808 8020 133) · Gambling Care (Ireland).

What is in a Patent

7 bets on 3 selections:

Part of the bet	Bets
Singles	3
Doubles	3
Trebles	1
Total	7

A Patent is the three-selection version of a Lucky 15. It costs seven stakes, so one winner at short odds will not cover the outlay; two or three winners usually do.

How the return is worked out

Each line is settled on its own: the line stake times the decimal odds of every selection in it, multiplied together. A losing selection makes every line it is in return nothing. A void selection counts as odds of 1.0. For each way bets the place part uses place odds: (decimal odds − 1) × place fraction + 1.

line return = stake × odds₁ × odds₂ × … and total return = sum of all line returns

Worked example

£1 a line: A at 3/1 (won), B at 2/1 (won), C at 5/1 (lost). Total stake £7.00.

Line that pays	Part	Returns
A	Win	£4.00
B	Win	£3.00
A + B	Win	£12.00
Total return		£19.00
Profit		£12.00

Not included: rule 4 deductions, dead heats, each way extra places and bookmaker bonuses (for example double odds on a single winner). Your bookmaker's settlement is final.

Questions

How many bets are in a Patent?

Seven: 3 singles, 3 doubles and 1 treble. A £1 Patent costs £7, or £14 each way.

What is the difference between a Patent and a Trixie?

A Trixie has no singles: it is the 3 doubles and the treble, four bets. You need two winners for a Trixie to return anything.

Patent bet calculator