Enter the speed of the boat (knots) and the waterline length (ft) into the Calculator. The calculator will evaluate the Speed Length Ratio.

## Speed Length Ratio Formula

SL = V / SQRT(L)

Variables:

- SL is the Speed Length Ratio ()
- V is the speed of the boat (knots)
- L is the waterline length (ft)

To calculate the Speed Length Ratio, divide the speed of the boat by the square root of the water length.

## How to Calculate Speed Length Ratio?

The following steps outline how to calculate the Speed Length Ratio.

- First, determine the speed of the boat (knots).
- Next, determine the waterline length (ft).
- Next, gather the formula from above = SL = V / SQRT(L).
- Finally, calculate the Speed Length Ratio.
- 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.

speed of the boat (knots) = 5

waterline length (ft) = 20