๐ Square Footage Calculator
Rectangle
Circle
Triangle
Irregular
For irregular shapes, break down the area into simple shapes (rectangles, triangles, etc.), calculate each separately, and add them together.
Section 1
๐ How to Use This Calculator
Select Your Measurement Units
Choose between imperial (feet) or metric (meters) units based on your preference.
Choose the Shape
Select the shape that best matches your area: rectangle, circle, triangle, or irregular.
Enter Dimensions
Input the required measurements for your selected shape.
Get Your Results
Click "Calculate" to instantly see your square footage result.
Pro Tip
For complex spaces, break the area into simple shapes and calculate each separately, then add them together using the "Irregular" option.
๐ Common Applications
- Flooring Projects: Calculate how much carpet, hardwood, tile, or laminate you'll need.
- Painting: Determine how much paint to buy for walls and ceilings.
- Landscaping: Measure areas for sod, mulch, or other ground coverings.
- Construction: Plan material needs for decks, patios, and other structures.
- Real Estate: Verify property square footage for listings or appraisals.
๐ Square Footage Formulas
- Length and Width are measured in the same unit (feet or meters)
- ฯ (pi) is approximately 3.14159
- r is the radius of the circle
- Base is the length of one side of the triangle
- Height is the perpendicular distance from the base to the opposite vertex
Unit Conversion Reference
| From | To | Multiply By |
|---|---|---|
| Square Feet (sq ft) | Square Meters (mยฒ) | 0.0929 |
| Square Meters (mยฒ) | Square Feet (sq ft) | 10.764 |
| Square Feet (sq ft) | Square Yards (sq yd) | 0.1111 |
| Square Feet (sq ft) | Acres | 0.00002296 |
โ Frequently Asked Questions
Square footage is a measurement of area expressed in square feet. One square foot is a square that is one foot on each side. It's calculated by multiplying length by width for rectangular areas.
To measure square footage for flooring:
- Measure the length and width of the room in feet
- Multiply these two numbers together
- Add 5-10% extra for waste, cuts, and mistakes
- For irregular rooms, divide the space into rectangles, calculate each separately, and add them together
It's recommended to add 5-10% extra material to your square footage calculation to account for:
- Cutting waste
- Installation errors
- Damaged materials
- Irregular shapes that require additional cuts
- Future repairs
For complex patterns like herringbone or diagonal installations, you might need to add 15-20% extra.
To calculate square footage for walls when painting:
- Measure the height and width of each wall in feet
- Multiply height ร width to get the square footage of each wall
- Add all wall square footages together
- Subtract the area of windows and doors (measure each and subtract from total)
- The result is your paintable wall area in square feet
Most paint cans tell you how many square feet they cover, so divide your total square footage by that number to determine how many cans you need.
Square feet (sq ft) measures area - the size of a two-dimensional surface. It's calculated as length ร width.
Cubic feet (cu ft) measures volume - the amount of three-dimensional space. It's calculated as length ร width ร height.
For example, a room might have 100 square feet of floor area, but 800 cubic feet of volume if the ceiling is 8 feet high.
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