Enter the length, width, and desired thickness of the area to be tiled into the calculator to determine the amount of deck mud needed (in cubic feet); this calculator can also evaluate any of the variables given the others are known.

## Deck Mud Formula

The following formula is used to calculate the amount of deck mud needed for a tile installation.

DM = (L * W * D) / 324

Variables:

- DM is the amount of deck mud needed (in cubic feet)
- L is the length of the area to be tiled (in inches)
- W is the width of the area to be tiled (in inches)
- D is the desired thickness of the deck mud (in inches)

To calculate the amount of deck mud needed, multiply the length, width, and desired thickness of the area to be tiled. Then divide the result by 324 to convert the volume from cubic inches to cubic feet.

## What is a Deck Mud?

Deck mud, also known as floor mud or dry pack mortar, is a simple mixture of sand, cement, and sometimes lime, used primarily in the construction industry. It is typically used to create a flat, level surface, such as a shower pan or a floor, before the installation of tiles or other finishes. The mixture is called “deck mud” because of its low water content, which gives it a dry, crumbly texture that can be easily shaped and smoothed. The ratio of sand to cement can vary, but a common mixture is 5 parts sand to 1 part cement. Lime may be added to increase the mixture’s workability and durability. Once the deck mud is spread and packed down, it forms a sturdy, stable base for further construction.

## How to Calculate Deck Mud?

The following steps outline how to calculate the Deck Mud:

- First, determine the area of the surface where the deck mud will be applied (in square feet).
- Next, determine the desired thickness of the deck mud (in inches).
- Next, convert the desired thickness from inches to feet by dividing it by 12.
- Next, multiply the area by the desired thickness to calculate the volume of deck mud needed (in cubic feet).
- Finally, calculate the amount of dry mix needed by multiplying the volume of deck mud by the recommended mix ratio (e.g., 4 parts sand to 1 part cement).

**Example Problem:**

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

Area of surface (ft²) = 100

Desired thickness (in) = 2

Recommended mix ratio = 4 parts sand to 1 part cement