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`A = 2 * l * h + 2 * w * h + l * w
`

Enter a value for all fields

The **Surface Area of a Room** calculator computes the surface area of the interior of a rectangular room including the walls and ceiling based on the length, width and height of the room. * The Frame of a Room*

**INSTRUCTIONS:** Choose units and enter the following:

- (
**L**) The length of the room - (
**W**) The width of the room - (
**H**) The height of the room

**Total Surface Area (A):** The calculator will return the total surface area (**A**) of the interior room including the walls and ceiling. The area is returned in square feet. However, this can be automatically converted to other area units (e.g. square meters) via the pull-down menu.

The surface area of the interior of a room including the walls and ceiling is the sum of the area of the walls and the area of the ceiling. These areas can be determined by the dimensions of the room. The total area is the sum of:

- The area of two walls, where Area = L*H
- The area of two walls, where Area = W*H
- The area of the ceiling, where Area = L*W

This totals to compute the area of the interior of the room in the following equation:

A = 2(L•H) + 2(W•H) + L•W

**where:**

- A = Total Surface Area of a Room including walls and ceiling
- L = Length of the room
- W = Width of the room
- H = Height of the room

**Note:** The above does not include the area of the floor. The formula for the total surface area of the interior of a room including walls, ceiling and floor is:

A = 2(L•H) + 2(W•H) + 2(L•W)

**where:**

- A = Total Surface Area of a Room including walls, ceiling and floor
- L = Length of the room
- W = Width of the room
- H = Height of the room

- Surface Area of the Room including the walls and ceiling
- Drywall to Cover a Room including the walls and ceilings
- Drywall cost of Material (wall board) for a room including the walls and ceiling
- Cost to Finish Drywall. This includes taping, mudding and sanding up to preparation to paint.
- Drywall Sheets for a Wall or Area
- Drywall Cost of Material (wall boards) for a Wall
- Compute the number of gallons to paint or primer a room
- Compute the cost to paint or prime a room
- Compute the volume of a room
- Compute the surface area of the interior walls of a room
- Compute the floor area of a room

Pricing for drywall is an estimate. The pricing per sheet used in this estimator is as follows:

- Drywall Pricing Survey Date: 2/2/18
- Drywall Pricing Survey Store: Home Depot
- The pricing for a 1/2 inch 4x8 sheet of drywall is $11.29
- The pricing for a 5/8 inch 4x8 sheet of drywall is $12.57
- The pricing for a 1/2 inch 4x12 sheet of drywall is $16.77
- The pricing for a 5/8 inch 4x12 sheet of drywall is $18.89