Square Footage Calculator
Calculate the area of rooms and surfaces with multiple shape options. Add multiple areas, convert between units, and estimate project costs for flooring, painting, and other home improvement projects.
Project Cost Estimator
Area Formulas for Common Shapes
| Shape | Formula |
|---|---|
| Rectangle | A = length × width |
| Triangle | A = (base × height) ÷ 2 |
| Circle | A = πr² |
| Trapezoid | A = ((base1 + base2) × height) ÷ 2 |
| L-Shape | A = rect1 area + rect2 area |
About Square Footage Calculator
Square footage is a fundamental measurement for home improvement, real estate, and construction projects. Whether you're planning to install new flooring, paint walls, or estimate project costs, knowing the exact square footage is essential.
This calculator helps you quickly compute areas for various room shapes and estimate project costs based on price per square foot.
How Square Footage Calculator Works
- Rectangle: Most common room shape. Area = length × width
- Triangle: For angled walls or triangular spaces. Area = (base × height) ÷ 2
- Circle: For round rooms or curved spaces. Area = π × radius²
- Trapezoid: For rooms with non-parallel walls. Area = ((base1 + base2) × height) ÷ 2
- L-Shape: Break into two rectangles and add areas together
- Unit Conversion: Automatically converts to square meters and yards
What This Calculator is Good For
- Flooring Projects: Calculate materials needed for hardwood, tile, or carpet.
- Painting: Estimate paint quantity and cost for wall coverage.
- Landscaping: Calculate area for sod, mulch, or other yard materials.
- Real Estate: Verify property square footage listings.
- Renovation Planning: Estimate project costs and material quantities.
- Rent/Lease Calculations: Determine cost per square foot for rental properties.
Limitations & Considerations
- Measurement Accuracy: Results depend on accurate room measurements.
- Irregular Shapes: Complex room shapes should be broken into simple shapes.
- Sloped Ceilings: This calculator measures floor area; sloped ceilings require separate calculation.
- Openings: Subtract area of doors, windows, and other openings for accurate material estimates.
- Waste Factor: Add 10-15% extra for cutting waste in material estimates.
- Cost Estimates: Prices vary by location, material quality, and contractor rates.
Frequently Asked Questions
Measure from wall to wall at multiple points to account for irregular walls. Use a tape measure and round to the nearest 0.1 foot for accuracy.
For most projects, add 10-15% extra to account for cutting waste, mistakes, and future repairs. For complex patterns, add up to 20%.
Calculate the main room area, then add the area of the alcove or closet separately. Or break the entire room into rectangles and add them together.
1 square meter = 10.764 square feet. This calculator automatically converts between units for your convenience.
Cost estimates are approximations. Actual costs vary by location, material quality, labor rates, and project complexity. Get quotes from contractors for accurate pricing.