Enter the stellar radius and the star-planet distance into the Calculator. The calculator will evaluate the Transit Probability.

## Transit Probability Formula

Tp = R/a

Variables:

- Tp is the Transit Probability ()
- R is the stellar radius
- a is the star-planet distance

To calculate Transit Probability, divide the stellar radius by the star-to-planet distance.

## How to Calculate Transit Probability?

The following steps outline how to calculate the Transit Probability.

- First, determine the stellar radius.
- Next, determine the star-planet distance.
- Next, gather the formula from above = Tp = R/a.
- Finally, calculate the Transit Probability.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem : **

Use the following variables as an example problem to test your knowledge.

stellar radius = 5000

star-planet distance = 123000