1. How to calculate square footage?

To calculate square footage, you multiply the length and width of a room or area by feet.

The formula is:

Square Footage = Length (in ft) x Width (in ft).

Example: A room 12 ft long and 10 ft wide = 120 sq ft.

2. How do you explain the conversion of feet to square feet?

To convert feet to square feet, you need to understand that square feet is a unit of area, while feet is a unit of length.

For example, if you have a space that is 10 feet long and 10 feet wide, the area is 10 x 10 = 100 square feet.

3. How to calculate square footage for 'L' shaped rooms or areas?

To calculate square footage for 'L' shaped rooms or areas, you need to divide the area into two separate rectangles and calculate the area of each rectangle separately.

Then, add the areas of the two rectangles together to get the total square footage.

Example:

One rectangle of 10 ft long and 5 ft wide, and one rectangle of 3 ft long and 2 ft wide will lead to the following:

• Calculate area for the first rectangle: 10 x 5 = 50 sq ft
• Calculate area for the second rectangle: 3 x 2 = 6 sq ft
• Calculate the total area: 50 + 6 = 56 sq ft.

4. How to calculate square footage for walls?

To calculate square footage for walls, you need to calculate the area of each wall separately.

Wall Area = Height × Length.

Example: A 10 ft (length) × 8 ft (height) wall = 80 sq ft.

Remember that some of your walls will have doors and windows. In such cases, you will need to subtract them from the wall area. Additionally, if your walls have unusual shapes, you should divide them into simpler shapes (rectangles or triangles) and calculate the area of each section separately.

5. How to calculate the square footage of a house?

To calculate a house's square footage, you need to calculate the area of each room and add them together. You can use a floor plan or measure each room individually. Remember to include hallways, closets, and other areas.

Example:

3 rooms (200 + 300 + 100 sq ft) = 600 sq ft total.

6. How do we convert the square footage into square inches, square yards, and square meters?

To convert square feet into square inches, square yards, or square meters, consider these conversion factors:

• 1 square foot = 144 square inches
• 1 square foot = 0.1111 square yards (since 1 sq yard = 9 sq ft)
• 1 square foot = 0.0929 square meters (1 sq meter ≈ 10.764 sq ft)

To convert your values from square feet to other area units, multiply or divide by the conversion factor.

6. What is the square footage formula?

The square footage formula is:

Square Footage = Length (in ft) x Width (in ft).

7. How to calculate the cost per square foot?

To calculate the cost per square foot, you must divide the total cost by the square footage.

Cost per sq ft = Total Cost ÷ Total Square Footage.

For example, if the total cost is $15,500 and the total square footage is $1,000, the price per square foot is $15,500/$1,000 = $15,5 per square foot.

8. What is a square foot?

A square foot is a unit of area equal to the area of a square with sides of one foot. It is a common unit of measurement for rooms, houses, and other areas.

9. How do I convert acres to square feet?

To convert acres to square feet, you can use the following conversion factor:

1 acre = 43,560 square feet.

Multiply the number of acres by 43,560 to get the total square footage.

Example: 4 acres = 174,240 sq ft.

Geometric shape formulas

Square

Formula: Area = side * side or Area = side²

Example: If the side length of a square is 4 cm, the area is:

Area = 4² = 16 cm²

Rectangle

Area = length × width

or

Area = l * w

Example: If the length of a rectangle is 6 cm and the width is 3 cm, the area is:

Area = 6 × 3 = 18 cm²

Triangle

a. Based on edge lengths (Heron's formula)

Area = √(s(s-a)(s-b)(s-c)), where
s = (a+b+c)/2 and a, b, c are the edge lengths.

Example: If the edge lengths of a triangle are 3 cm, 4 cm, and 5 cm, the semi-perimeter s is:
s = (3+4+5)/2 = 6
Area = √(6(6-3)(6-4)(6-5)) = √(6×3×2×1) = √36 = 6 cm²

b. Based on base and height

Area = (base × height) / 2
or
Area = (1/ 2) * b * h

Example: If the base of a triangle is 10 inches and the height is 6 inches, the area is:
Area = (10 × 6) / 2 = 30 in²

Trapezoid

Area = ((a + b) × height) / 2, where
a and b are the lengths of the parallel sides.

Example: If the lengths of the parallel sides of a trapezoid are 4 m and 6 m, and the height is 3 m, the area is:

Area = ((4 + 6) × 3) / 2 = (10 × 3) / 2 = 15 m²

Parallelogram

Area = base × height

or

Area = b * h

Where:

• b is the length of the base.
• h is the perpendicular height to that base.

Example: If the base of a parallelogram is 5 feet and the height is 4 feet, the area is: Area = 5 × 4 = 20 ft²

Sector (of a circle)

Area = (θ / 360°) * π * r²

Where:

• θ (theta) is the central angle of the sector in degrees.
• r is the radius of the circle.
• π (pi) is approximately 3.14159

Example: A sector has a central angle of 60° and a radius of 4 meters.

Area = (60° / 360°) * π * (4 m)² = (1/6) * π * 16 m² = (16π/6) m² ≈ 8.38 m²

Key Takeaways

• Always ensure measurements are in feet for square footage.
• Break up irregular shapes (e.g., L-shaped rooms) into simpler shapes.
• Use conversions for different units (e.g., sq inches, sq meters).
• For cost calculations, divide the total cost by the total area.

Related: Square feet to acres
Square feet to square meters.