Square Footage Calculator
Whether you are planning a flooring project, painting a room, or evaluating real estate, knowing the exact square footage (ft²) of an area is essential. This calculator quickly determines the total area of a rectangular space based on length and width measurements. It also includes an optional feature to estimate project costs based on price per square foot.
Calculate Area & Cost
Understanding Square Footage Calculations
Square footage is a measurement of area, most commonly used in the United States and Canada, to express the size of a two-dimensional space like a floor, wall, or ceiling. It is calculated by multiplying the length of the space by its width.
The basic formula is:
Area (ft²) = Length (in feet) × Width (in feet)
How to Measure for Square Footage
- Clear the area: Ensure you have a straight path along the walls you need to measure.
- Measure the length: Use a tape measure to find the longest side of the rectangular area in feet.
- Measure the width: Measure the shorter side of the rectangular area in feet.
- Input the data: Enter these two numbers into the calculator above to get the total square footage.
Handling Complex Shapes
If your room is not a perfect rectangle (e.g., an L-shaped living room or a room with a closet alcove), the easiest method is to divide the space into separate, smaller rectangles. Calculate the square footage of each individual rectangle and add them together for the total area.
Realistic Calculation Examples
Example 1: Bedroom Flooring
You want to replace the carpet in a standard master bedroom. You measure the room and find it is 14 feet long and 12.5 feet wide.
- Calculation: 14 ft × 12.5 ft = 175 sq ft.
You need to purchase 175 square feet of flooring material (plus a standard 5-10% extra for waste cuts).
Example 2: Garage Epoxy Project with Cost
You plan to coat your 2-car garage floor with epoxy. The garage measures 20 feet by 22 feet. The epoxy kit you are looking at costs roughly $2.75 per square foot to apply.
- Area Calculation: 20 ft × 22 ft = 440 sq ft.
- Cost Calculation: 440 sq ft × $2.75 = $1,210.00 estimated material cost.
Using the calculator above, you would enter Length: 20, Width: 22, and Price per Sq. Ft.: 2.75 to receive both totals instantly.