Geometry
Find areas, perimeters, volumes and surface areas of familiar shapes.
Circle area calculator
Find the area and circumference of a circle from its radius. Use any consistent length unit.
Open toolPythagorean theorem calculator
Find the hypotenuse of a right triangle from the lengths of its two perpendicular sides.
Open toolRectangle calculator
Find a rectangle’s area, perimeter and diagonal from its length and width. Keep both dimensions in the same unit.
Open toolTriangle area calculator
Calculate the area of a triangle from a base and its perpendicular height. Both measurements must use the same length unit.
Open toolCylinder calculator
Calculate the volume and total surface area of a right circular cylinder using its radius and perpendicular height.
Open toolSphere calculator
Find the volume and surface area of a sphere from its radius. Enter a consistent length measurement for the radius.
Open toolCone calculator
Find the volume, total surface area and slant height of a right circular cone from its base radius and perpendicular height.
Open toolTriangle Calculator
What are the area and angles of a triangle when I know its three sides? Enter the values below to calculate the result.
Open toolTriangle Perimeter Calculator
What is the perimeter of a triangle with these three sides? Enter the values below to calculate the result.
Open toolTriangle Angle Calculator
What is the missing third angle of a triangle? Enter the values below to calculate the result.
Open toolRight Triangle Calculator
How long is the hypotenuse, and what are the angles, given the two legs? Enter the values below to calculate the result.
Open toolTriangle Side Calculator
How long is the missing side when I know two sides and their included angle? Enter the values below to calculate the result.
Open toolLaw Of Sines Calculator
How do I find triangle sides from one side and two angles? Enter the values below to calculate the result.
Open toolEquilateral Triangle Calculator
What are the area, height and perimeter of an equilateral triangle? Enter the values below to calculate the result.
Open toolIsosceles Triangle Calculator
What are the height and area of an isosceles triangle from its base and equal side? Enter the values below to calculate the result.
Open toolParallelogram Calculator
What is the area of a parallelogram from its side lengths and included angle? Enter the values below to calculate the result.
Open toolRhombus Calculator
What are the area and perimeter of a rhombus from its diagonals? Enter the values below to calculate the result.
Open toolTrapezoid Calculator
What is the area of a trapezoid from its parallel bases and height? Enter the values below to calculate the result.
Open toolKite Calculator
What is the area of a kite from its diagonals? Enter the values below to calculate the result.
Open toolRadius Calculator
What is the radius of a circle with this circumference? Enter the values below to calculate the result.
Open toolDiameter Calculator
What is the diameter of a circle with this area? Enter the values below to calculate the result.
Open toolArc Length Calculator
How long is an arc with this radius and central angle? Enter the values below to calculate the result.
Open toolChord Calculator
How long is the straight chord between the ends of an arc? Enter the values below to calculate the result.
Open toolSector Calculator
What is the area of a circular sector with this radius and angle? Enter the values below to calculate the result.
Open toolCircular Segment Calculator
What is the area between a chord and its circular arc? Enter the values below to calculate the result.
Open toolAnnulus Calculator
What is the area of a ring between two circles? Enter the values below to calculate the result.
Open toolRegular Polygon Calculator
What are the area and perimeter of a regular polygon? Enter the values below to calculate the result.
Open toolPentagon Calculator
What are the area and perimeter of a pentagon? Enter the values below to calculate the result.
Open toolHexagon Calculator
What are the area and perimeter of a hexagon? Enter the values below to calculate the result.
Open toolHeptagon Calculator
What are the area and perimeter of a heptagon? Enter the values below to calculate the result.
Open toolOctagon Calculator
What are the area and perimeter of a octagon? Enter the values below to calculate the result.
Open toolNonagon Calculator
What are the area and perimeter of a nonagon? Enter the values below to calculate the result.
Open toolDecagon Calculator
What are the area and perimeter of a decagon? Enter the values below to calculate the result.
Open toolDodecagon Calculator
What are the area and perimeter of a dodecagon? Enter the values below to calculate the result.
Open toolPolygon Angle Calculator
What is the sum of interior angles in an n-sided polygon? Enter the values below to calculate the result.
Open toolCube Volume Calculator
How much space does a cube with this side length occupy? Enter the values below to calculate the result.
Open toolCube Surface Area Calculator
What is the total area of all six faces of a cube? Enter the values below to calculate the result.
Open toolCuboid Calculator
What are the volume, surface area and diagonal of a rectangular box? Enter the values below to calculate the result.
Open toolCone Frustum Calculator
What is the volume and surface area of a cone with its top cut off? Enter the values below to calculate the result.
Open toolHemisphere Calculator
What is the volume and surface area of half a sphere? Enter the values below to calculate the result.
Open toolSpherical Cap Calculator
What is the volume of the rounded cap cut from a sphere? Enter the values below to calculate the result.
Open toolSpherical Segment Calculator
What is the volume between two parallel cuts through a sphere? Enter the values below to calculate the result.
Open toolEllipsoid Calculator
What is the volume of an ellipsoid from its three semi-axes? Enter the values below to calculate the result.
Open toolSpheroid Calculator
What is the volume of a sphere stretched or flattened along one axis? Enter the values below to calculate the result.
Open toolPyramid Calculator
What is the volume of a pyramid from its base area and height? Enter the values below to calculate the result.
Open toolPyramid Frustum Calculator
What is the volume of a pyramid with its top cut off? Enter the values below to calculate the result.
Open toolTetrahedron Calculator
What are the volume and surface area of a regular tetrahedron? Enter the values below to calculate the result.
Open toolOctahedron Calculator
What are the volume and surface area of a regular octahedron? Enter the values below to calculate the result.
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