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The Parlay Machine / Educational calculator

ADD A CONDITION.
LOOK AT THE PRICE.

Enter American odds to explore how a combined price changes—not to predict what will happen.

Build an example.

1–12 LEGS

Use a hypothetical amount. This tool does not place wagers or connect to sportsbooks.

American odds must be whole numbers from −100,000 to −100 or +100 to +100,000. Empty or invalid entries do not produce an estimate.

The other side of the number

Read both numbers.

Hypothetical total return—Includes the example amount.
Combined price-implied percentage—

A price is not a true probability.

The calculation multiplies decimal prices and takes their reciprocal. Bookmaker margin is included. Correlated legs, special rules and actual quoted combined prices can differ. No outcome or return is guaranteed.

How the calculation works

Visible arithmetic.
Visible limits.

Positive American odds convert to 1 + odds ÷ 100. Negative odds convert to 1 + 100 ÷ absolute odds. The decimal prices are multiplied, then applied to the example amount.

100 ÷ combined decimal price gives the price-implied percentage. It does not establish the chance that all the events will occur.

You can also leave the ticket alone →