Superfecta Calculator

Superfecta calculator: work out the combinations and cost of a superfecta box, key, straight or wheel, at 10 cents, $1 or any base bet.

Your superfecta

For a key, count the key horse too.
Many tracks take 10-cent superfectas; $1 is the other common base.

Combinations and cost

Combinations–
Total cost–
Cost of the same box at $1–

Box = n × (n−1) × (n−2) × (n−3). Key on top = (n−1) × (n−2) × (n−3). Nested wheel = a × (b−1) × (c−2) × (d−3). Cost = combinations × base bet. A 10-cent superfecta pays a tenth of the $1 payout.

Maths checked by Josh Miller · updated Nov 2026How we calculate →

A superfecta calculator saves you from the nasty surprise at the window. Box five horses in a superfecta and you’ve bought 120 combinations. At the 10-cent minimum that’s $12; at $1 it’s $120. Box six and it jumps to 360 combinations. The free calculator above handles boxes, keys, straight bets and position wheels, at whatever base bet your track takes.

How the superfecta calculator counts combinations

A superfecta asks for the first four finishers in exact order. That’s what makes it hard and why it pays so well.

Box (any order)        = n × (n − 1) × (n − 2) × (n − 3)
Key one horse on top   = (n − 1) × (n − 2) × (n − 3)
Wheel by position      = a × (b − 1) × (c − 2) × (d − 3)

A key cuts the cost hard. Five horses with one keyed on top is 4 × 3 × 2 = 24 combinations instead of 120. You lose the ticket if the key doesn’t win, but if you’re confident about the winner and unsure about the rest, it’s the efficient play.

The wheel assumes nested positions: your horses for 2nd include your 1st-place pick, your 3rd-place horses include both, and so on. That’s how most people build them. If yours aren’t nested, count the tickets on the tote screen.

10-cent superfectas

Many tracks let you bet superfectas for a dime per combination. You get a tenth of the posted $1 payout, so a $2,400 superfecta pays $240 on a 10-cent ticket. That lets you spread wider for the same money, which is often the only realistic way to hit one at all in a big field.

Fewer legs? The exacta box calculator handles the top two and the trifecta calculator the top three. For multi-race tickets, use the Pick 6 calculator.

Bet with money you can afford to lose. If it stops being fun, BeGambleAware.org is free and confidential.

Frequently asked questions

How much does a 5-horse superfecta box cost?

120 combinations: $12 at 10 cents, $120 at $1.

How many combinations is a 4-horse superfecta box?

24 (4 × 3 × 2 × 1).

How does a 10-cent superfecta pay?

A tenth of the $1 payout. If the $1 superfecta pays $800, a 10-cent ticket pays $80.

What is a superfecta key?

You pick one horse to win and box the others for 2nd to 4th, which costs far less than a full box.

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