Pick your Shape Type — rectangle, triangle, circle, and more — then enter dimensions like Length, Width, Radius, or Sides, and the Square Footage Calculator returns your square footage alongside conversions to square inches, square yards, and square meters, plus a Total with Waste.
Square Footage
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Square Inches
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Square Yards
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Square Meters
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Total with Waste
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Total Cost
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Each shape has its own formula: rectangles use length × width, circles use π × radius², triangles use ½ × base × height or Heron's formula. Our calculator automatically applies the correct formula based on your selected shape.
Yes, the calculator automatically converts your square footage to square inches, square yards, and square meters. This makes it easy to work with different measurement systems or material specifications.
Measure each room or area separately, then add them together. Include a waste factor of 5-15% for materials like flooring or tile to account for cuts and mistakes. Always double-check your measurements before ordering materials.
Absolutely! Use it to calculate lawn areas, garden beds, deck sizes, or patio spaces. The calculator works with any flat surface area, making it perfect for determining how much sod, mulch, or stone you need.
A waste factor accounts for material lost during cutting, installation mistakes, or future repairs. Typically 5-10% for simple projects and 10-15% for complex layouts with many cuts.
Cost calculations are based on the price per square foot you enter. Remember to include additional costs like underlayment, adhesive, trim, or labor when budgeting for your project.
Use the quantity field to multiply identical rooms or areas. For different sized rooms, calculate each separately and add the results together for your total square footage.