Enter the MLCAPE and the wind speed difference between the density-weighted 0-6km mean wind and the lowest 500 m mean wind into the Bulk Richardson Number Calculator. The calculator will evaluate the Bulk Richardson Number.

## Bulk Richardson Number Formula

The following two example problems outline the steps and information needed to calculate the Bulk Richardson Number.

BRN = MLCAPE / (.5*U^2)

Variables:

- BRN is the Bulk Richardson Number ( )
- MLCAPE is the MLCAPE
- U is the wind speed difference between the density-weighted 0-6km mean wind and the lowest 500 m mean wind.

To calculate the Bulk Richardson number, divide the MLCAPE by the wind speed difference between the density-weighted 0-6km win and lowest 500m mean wind squared divide by 2.

## How to Calculate Bulk Richardson Number?

The following steps outline how to calculate the Bulk Richardson Number.

- First, determine the MLCAPE.
- Next, determine the wind speed difference between the density weighted 0-6km mean wind and the lowest 500 m mean wind.
- Next, gather the formula from above = BRN = MLCAPE / (.5*U^2).
- Finally, calculate the Bulk Richardson Number.
- 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.

MLCAPE = 5

wind speed difference between the density weighted 0-6km mean wind and the lowest 500 m mean wind = 20

BRN = MLCAPE / (.5*U^2)** **= ?