Enter the riprap length (ft), the riprap width (ft), and the riprap depth (in) into the Riprap Weight Calculator. The calculator will evaluate the Riprap Weight.

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## Riprap Weight Formula

The following formula is used to calculate the Riprap Weight.

**RW = RL * RW * RD/12 * 156.07**

Variables:

- RW is the Riprap Weight (lbs)
- RL is the riprap length (ft)
- RW is the riprap width (ft)
- RD is the riprap depth (in)

## How to Calculate Riprap Weight?

The following two example problems outline the steps and information needed to calculate the Riprap Weight.

**Example Problem #1**

- First, determine the riprap length (ft).
- The riprap length (ft) is calculated to be : 10.

- Next, determine the riprap width (ft).
- The riprap width (ft) is measured to be: 10.

- Next, determine the riprap depth (in).
- The riprap depth (in) is found to be: 5.

- Finally, calculate the Riprap Weight using the formula above:

RW = RL * RW * RD/12 * 156.07

The values provided above are inserted into the equation below and computed.

RW = 10 * 10 * 5/12 * 156.07 = 6502 (lbs)

**Example Problem #2**

The variables required for this problem are provided below:

riprap length (ft) = 12

riprap width (ft) = 12

riprap depth (in) = 3

Test your knowledge and check your answer with the calculator.

RW = RL * RW * RD/12 * 156.07 =** **(lbs)