Square Footage Calculator
Calculate area and estimated material cost.
Square Feet
100.00
sq ft
Square Meters
9.29
m²
Square Yards
11.11
sq yd
Acres
0.0023
acres
Estimated Cost
$1,500.00
Total Project Cost
What is a Square Feet Calculator?
A Square Feet Calculator is a measurement tool used to determine the surface area of a 2D space, such as a floor, wall, or landscape. By multiplying the length and width of an area, it outputs the total size in square feet (ft²), which is the standard unit of measurement for real estate and construction in the United States and many other regions.
At Nexli Calculator, our tool simplifies home improvement projects. Whether you are buying new carpet, painting a room, or planning a garden, calculating the exact square footage is the first step to estimating costs and material quantities.
Why Use Our Square Feet Calculator?
Total Price Estimation
Enter the “Price per Sq Ft” of your material (e.g., tile or wood) to instantly see the total project cost.
Multi-Unit Support
Measure in inches, centimeters, yards, or meters, and the tool will automatically convert the result to square feet.
Wastage Calculation
Avoid running short on materials by adding a custom overage percentage (e.g., 10% for cuts and waste).
Completely Free
Nexli Calculator offers this renovation utility 100% free with no sign-ups or downloads required.
Area Formulas & Logic
Calculating square footage uses basic geometry formulas. Here is the logic we use for different shapes:
Rectangular Rooms
The standard formula for rooms and walls.
- Area = Length × Width
- Total Cost = Area × Cost per Sq Ft
- Example: 10ft × 12ft = 120 sq ft.
Unit Conversions
How we handle different inputs.
- Inches: (Length” × Width”) / 144
- Yards: (Length × Width) × 9
- Meters: (Length × Width) × 10.764
How to Use Our Square Feet Calculator
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1
Measure Dimensions
Using a tape measure, determine the length and width of the room or area.
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2
Enter Values
Input the dimensions into the calculator. You can calculate multiple areas and add them together.
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3
Calculate Cost (Optional)
Enter the price per square foot of your material to estimate the total budget for the project.