geometry Calculators
Last updated: May 2026
Circle Area Calculator
Calculates the area enclosed by a circle from its radius using A = π·r².
Rectangle Perimeter Calculator
Calculates the total boundary length of a rectangle from its length and width using P = 2·(length + width).
Triangle Area Calculator
Calculates the area of any triangle from its base and perpendicular height using A = ½·base·height.
Sphere Volume Calculator
Calculates the volume of a sphere from its radius using V = (4/3)·π·r³.
Cylinder Surface Area Calculator
Calculates the total outer surface area of a closed cylinder — both circular ends plus the curved side — using A = 2πr(r + h).
Pythagorean Theorem Calculator
Calculate the hypotenuse of a right triangle instantly by entering its two legs.
Trapezoid Area Calculator
Calculate the area of any trapezoid by entering its two parallel bases and height.
Cone Volume Calculator
Calculate the volume of a cone from its base radius and height in seconds.
Regular Hexagon Area Calculator
Compute the area of a regular hexagon from a single side length measurement.
Rectangular Prism Volume Calculator
Calculate the volume of any rectangular prism or box by entering its length, width, and height.
Triangle Area and Perimeter Calculator
Find the area or perimeter of any triangle by entering its three side lengths.
Circle Geometry Calculator
Convert any known circle measurement — radius, diameter, circumference, or area — into any other.
Rectangle and Square Calculator
Compute the area, perimeter, diagonal, or aspect ratio of any rectangle or square by entering its length and width.
Sphere Volume and Surface Area Calculator
Calculate the volume or surface area of a sphere from its radius.
Cylinder Volume and Surface Area Calculator
Compute the volume, total surface area, lateral area, or base area of a cylinder using its radius and height.
Trapezoid Area and Perimeter Calculator
Compute the area or perimeter of any trapezoid instantly.
Cone Volume and Surface Area Calculator
Find the volume, total surface area, lateral surface area, or slant height of any right circular cone.
Regular Polygon Calculator
Instantly calculate interior angles, exterior angles, area, and perimeter of any regular polygon.
Ellipse Area and Circumference Calculator
Calculate the area, circumference (perimeter), eccentricity, and focal distance of an ellipse using its semi-major and semi-minor axes.
Pythagorean Theorem Calculator
Solve for any side of a right triangle using the Pythagorean theorem, or validate whether three given lengths form a right triangle.
Triangle Area Calculator
Find the area of a triangle from its three side lengths using Heron's formula.
Circle Sector Calculator
Compute the area and arc length of a circle sector given a radius and central angle in degrees or radians.
Regular Polygon Area Calculator
Calculate the area, perimeter, and interior angles of any regular polygon — from equilateral triangles to dodecagons — given just the side length.
Sphere Calculator
Find a sphere's volume, surface area, diameter, or circumference by entering any one known measurement.
Rectangular Prism Calculator
Calculate the volume, surface area, and space diagonal of a rectangular prism (box) from its length, width, and height.
Cone Calculator
Compute a cone's volume, lateral surface area, total surface area, and slant height from its base radius and height.
Ellipse Calculator
Calculate the area, perimeter, and eccentricity of an ellipse from its semi-major and semi-minor axes.
Cylinder Calculator
Find a cylinder's volume, lateral surface area, and total surface area from its base radius and height.
Triangle Area Calculator
Calculate a triangle's area using base-height, Heron's formula (three sides), or the two-sides-and-included-angle method.
Circle Calculator
Calculate any circle property — area, circumference, diameter, or radius — by entering any one known measurement.
Rectangle Calculator
Find any rectangle measurement — area, perimeter, or diagonal — from any two known values such as length and width, area and a side, or perimeter and a side.
Sphere Calculator
Compute a sphere's volume, surface area, radius, or diameter from any single known measurement.
Cylinder Calculator
Calculate a cylinder's volume, total surface area, or lateral surface area from its radius and height.
Regular Polygon Calculator
Compute the area, perimeter, and interior angles of any regular polygon from the number of sides and one known measurement such as side length, circumradius, or apothem.
Trapezoid Calculator
Calculate the area and perimeter of a trapezoid using its two parallel bases, height, and optional leg lengths.
Cone Calculator
Compute the volume, lateral surface area, total surface area, or slant height of a right circular cone from its base radius and height.
Ellipse Calculator
Calculate the area, perimeter, eccentricity, or focal distance of an ellipse from its semi-major and semi-minor axes.
Prism Calculator
Find the volume, total surface area, or lateral surface area of any prism — triangular, rectangular, or polygonal — from its base dimensions and height.
Circle Arc and Sector Calculator
Calculate the arc length, sector area, or circular segment area for a given radius and central angle in degrees or radians.
Regular Polygon Properties Calculator
Compute the area, perimeter, apothem, or interior angle of any regular polygon given its number of sides and side length.
Cone and Pyramid Calculator
Compute volume, total surface area, or slant height for cones, square pyramids, and triangular pyramids.
Ellipse Properties Calculator
Find the area, perimeter, eccentricity, or focal distance of any ellipse given its semi-major and semi-minor axes.
Coordinate Geometry Calculator
Calculate the distance, midpoint, slope, or angle between two points on a coordinate plane.
Cylinder Surface Area and Volume Calculator
Compute the volume, lateral area, or total surface area of solid, hollow, or open-top cylinders.
Rectangle & Golden Ratio Calculator
Calculate the area, perimeter, or diagonal of any rectangle, and find golden ratio dimensions given one side.
Coordinate Geometry Calculator
Find the distance, midpoint, slope, or line equation between any two points on a coordinate plane.