Square Footage Calculator
Calculate square footage, area, square yards, square meters, and acreage for rooms, flooring, landscaping, roofing, painting, real estate, and construction projects.
Example Projects
Area Calculations
View Calculation Breakdown
Detailed Measurements Live
| Total Square Footage (Gross) | 0.0 sq ft |
| Net Area (No Waste) | 0.0 sq ft |
| Waste Material Added | 0.0 sq ft (10%) |
| Square Yards | 0.0 sq yd |
| Square Meters | 0.0 m² |
| Acres | 0.00000 acres |
| Hectares | 0.00000 hectares |
| Total Perimeter | 0.0 ft |
How this was calculated:
Fill in the dimensions above to output step-by-step formula logs...
Everything behind the Square Footage Calculator
Formulas, reference charts, and detailed answers — expand any section you need.
Common Square Footage Reference Table
| Area Type | Average Square Feet |
|---|---|
| Small Bedroom | 100 - 150 sq ft |
| Master Bedroom | 200 - 350 sq ft |
| Single Garage | 240 - 300 sq ft |
| Double Garage | 400 - 600 sq ft |
| Small Apartment | 500 - 800 sq ft |
| Standard House | 1,000 - 3,000+ sq ft |
How to Calculate Square Footage
Square footage is calculated by multiplying length by width.
This formula is used for rectangular spaces such as rooms, patios, driveways, lawns, and flooring projects. The calculator automatically converts measurements into square feet and additional units.
What Is Square Footage?
Square footage is a measurement of area. One square foot represents an area measuring 1 foot × 1 foot. Square footage is widely used in:
- Real Estate (listing sizes, lot measurements)
- Construction (estimating slab boundaries, materials)
- Interior Design (furniture layouts)
- Landscaping (sod, mulch coverage)
- Flooring (hardwood, tiles, carpet estimation)
Understanding square footage helps estimate materials and project costs accurately.
Square Footage Calculator for Rooms
Room measurements are one of the most common uses of square footage calculations. Use this calculator for bedrooms, living rooms, kitchens, bathrooms, and basements.
Our Room Builder (Multiple Rooms) feature is designed exactly for this purpose. You can add each room one-by-one, specify its custom dimensions, and immediately see the combined net area of your house or office, making flooring estimates extremely simple.
Square Footage Calculator for Flooring
Flooring projects require accurate measurements to avoid material shortages. Whether you are installing hardwood, laminate, vinyl, carpet, or tile, you must first calculate the net square footage of the rooms.
Always include a waste factor of 5% to 15% when ordering flooring. Our built-in Waste Factor slider does this automatically, outputting the exact material quantity you should order to cover cuts and offsets.
Square Footage Calculator for Paint
Paint coverage depends on the total wall area. To calculate the wall area, measure the length and height of each wall, multiply them to find the square footage of each wall, and subtract the square footage of windows and doors.
Typically, one gallon of premium paint covers about 350 to 400 square feet of smooth wall surface with a single coat.
Square Footage Calculator for Landscaping
Landscaping projects require area calculations for sod, topsoil, mulch, gravel, and artificial turf. Knowing the square footage of your yard ensures you order the exact amount of cubic yards of topsoil or mulch, or rolls of sod, preventing expensive delivery runbacks.
Square Footage Calculator for Roofing
Roofing contractors calculate shingle and underlayment requirements based on the roof area. Roofing measurements are often represented in "squares", where 1 square equals 100 square feet.
To determine shingle requirements, calculate the flat square footage, apply a waste factor (typically 10% to 15%), and divide by 100.
Square Feet to Square Yards Conversion
Standard conversions between square feet and square yards are based on the relation: 1 square yard equals 9 square feet. Here are common reference points:
- 9 sq ft = 1 sq yd
- 90 sq ft = 10 sq yd
- 900 sq ft = 100 sq yd
Square Feet to Square Meters Conversion
To convert square feet to square meters, multiply by 0.092903. Here are common metric conversions:
- 100 sq ft = 9.29 sq m
- 500 sq ft = 46.45 sq m
- 1000 sq ft = 92.9 sq m
Square Footage Examples
Here is how square footage is calculated for common home renovation projects:
- Standard Bedroom: 12 ft × 14 ft = 168 sq ft
- Living Room: 20 ft × 15 ft = 300 sq ft
- Double Garage: 24 ft × 24 ft = 576 sq ft
- Backyard Lawn: 50 ft × 40 ft = 2,000 sq ft
Frequently Asked Questions
How do I calculate square footage?
Multiply length by width. For example, if a room is 12 feet long and 10 feet wide, its square footage is 12 × 10 = 120 square feet.
How many square feet are in a square yard?
One square yard equals 9 square feet. To convert square feet to square yards, divide your total square footage by 9.
How many square feet are in an acre?
One acre equals exactly 43,560 square feet.
Can I calculate multiple rooms?
Yes. Use the Room Builder tab to input dimensions for individual rooms and add them dynamically to combine their total area.
How much flooring should I order?
You should add a 5% to 15% waste factor depending on your material and installation pattern to cover mistakes and cut-offs.
How do I calculate square footage for a circle?
The calculator automatically uses the circle area formula: Area = π × radius² (where radius is half of the diameter).
Can I use this calculator for landscaping?
Yes. It works for estimating grass sod, soil beds, mulch coverage, gravel pathways, artificial turf, and general landscaping projects.
What is the difference between square feet and square meters?
Square feet are commonly used in the United States and Canada, while square meters are the standard international metric unit of area. 1 square meter is equal to approximately 10.7639 square feet.