Circle Calculations: Area & Circumference
Our area calculator circle functionality is designed to help you calculate the area of a circle with diameter or radius. Using the area circle formula (A = πr²), you can find the space inside any circular object. We also provide the area of circumference formula to relate these two metrics.
Beyond area, calculating circumference is vital for many projects. Whether you need the circle circumference formula or a calculate circumference of a circle tool, our circle perimeter calculator has you covered. For construction, use our circle square footage calculator to find the area of circular patios or pools.
Volume of a Cylinder & Sphere Formulas
Looking for the volume of a cylinder? Use our calculate the volume of a cylinder section to find the capacity of tanks and pipes. We also include an area of a cylinder calculator and the cylinder surface area formula to help you find surface area of cylinder for painting or coating. If you need the area of cylinder formula for a specific project, we break it down step-by-step.
For curved shapes, we provide the formula for volume of a sphere and the sphere surface area formula. Use the area of sphere formula to solve complex geometry problems. We also cover the cone volume formula for 3D modeling and construction.
Square Footage Calculator & Acreage Converters
Our square footage calculator is the ultimate tool for real estate and home improvement. Performing a calculation for square feet is the first step in any renovation. Use our square feet converter to switch between units, such as sq meters to square feet or square inches to square feet.
For land measurement, knowing the square footage of an acre (43,560 sq ft) is essential. Our square feet to acre converter makes large-scale planning easy. If you are working with larger areas, you can also convert feet into square yards using our integrated logic. For simple shapes, the area formula of square (A = s²) is always available.
Rectangle & Triangle Area Formulas
To find area of rectangle, use the area formula of rectangle (Length × Width). This formula to calculate area of rectangle is the foundation of most floor planning. If you need to find the "capacity" of a 2D space, you might even look for the volume of a rectangle (though technically called area in 2D).
For more complex geometry, use our triangle area formula (A = ½bh) to find the area of a triangle. Whether you need to calculate a triangle using Heron's formula or base/height, our formula for finding area of a triangle handles it all.
Advanced Shape Guide: Trapezoids, Rhombus, & Polygons
- Trapezoid: Use the area of a trapezoid formula or our calculate area of a trapezoid tool. The standard trapezoid formula is A = ½(a+b)h.
- Parallelogram: The area of a parallelogram formula is Base × Height, similar to a rectangle but slanted.
- Rhombus: Find the area of rhombus formula or use the rhombus formula with diagonals (½ d‚ d‚‚).
- Sectors & Ellipses: Use the area of the sector formula or find a calculate area of a sector tool. Our area of a sector of a circle calculator and area of an ellipse calculator (with the area of ellipse formula) provide precision for curved geometry.
- Polygons: We provide the area of a regular polygon formula for any number of sides. Use our area of a hexagon calculator or the area of pentagon formula for specialized projects.