Square Feet of Rectangle
Calculate the area of any rectangle in square feet by entering length and width. Free online square footage calculator for flooring, landscaping, construction, and home improvement projects.
About This Calculator
The Square Feet of Rectangle Calculator computes the area of any rectangular space by multiplying its length by its width. This is the most common calculation in construction, real estate, interior design, and landscaping where knowing the total square footage of a room, floor, yard, or surface is essential for material estimation, cost planning, and space utilization.
The area formula for a rectangle is A = L x W, where L is the length and W is the width measured in the same unit. For example, a rectangular room measuring 10 feet by 12 feet has an area of 120 square feet. This fundamental formula applies to any rectangle regardless of its size -- from a small bathroom floor to a large warehouse space. The calculator accepts any positive numeric values for length and width and computes the product instantly.
Square footage (sq ft) is the standard unit of area in the United States, Canada, and the United Kingdom for real estate listings, flooring materials, and construction estimates. Understanding how to calculate square footage is essential for homeowners, contractors, architects, and DIY enthusiasts alike. This calculator simplifies the process, eliminating manual math errors and providing instant, accurate results.
Common Uses
- Flooring: Calculate tile, hardwood, laminate, vinyl plank, or carpet quantities for rectangular rooms
- Landscaping: Measure garden beds, patios, lawns, driveways, and deck areas for soil, sod, or paving materials
- Construction: Estimate drywall, concrete, paint, roofing, and siding material requirements
- Real Estate: Quickly compute room dimensions, compare property sizes, and verify listing square footage claims
- HVAC: Determine room area for heating and cooling load calculations and equipment sizing
Frequently Asked Questions
How do you calculate square feet of a rectangle?
Multiply the length by the width: Area = Length x Width. For example, a 10 ft by 12 ft rectangle has an area of 120 sq ft.
What is the formula for rectangle area?
The formula for the area of a rectangle is A = L x W, where L is the length and W is the width. Both dimensions must be in the same unit.
Can I use this for flooring estimates?
Yes, this calculator is perfect for estimating flooring materials like tile, hardwood, laminate, or carpet for rectangular rooms.
How many square feet is a 12x12 room?
A 12 ft by 12 ft room has an area of 144 sq ft. This is calculated by multiplying 12 by 12.
How do I convert square feet to square meters?
To convert square feet to square meters, multiply the area in square feet by 0.0929. For example, 120 sq ft x 0.0929 = 11.15 sq m.
What if my room is not a perfect rectangle?
For irregularly shaped rooms, divide the floor plan into smaller rectangles, calculate the area of each rectangle separately, and add them together. Our calculator handles one rectangle at a time.
Is this calculator free?
Yes, all calculators on Calculy are completely free to use with no registration required.
Can I save or share my calculation?
Yes, the URL saves your length and width inputs so you can bookmark or share the exact calculation.