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Geometry Calculators
Free geometry calculators: area, perimeter, volume and surface area for circles, triangles, rectangles, spheres, cylinders and cones, in any unit.
Arc Length CalculatorLength of a circular arc from its radius and central angle.Area CalculatorArea of a rectangle, triangle, circle, trapezoid and more.Area of a Circle CalculatorArea of a circle from its radius, diameter or circumference.Circle CalculatorRadius, diameter, circumference and area from any one of them.Circumference CalculatorDistance around a circle from its radius, diameter or area.Cone Volume CalculatorVolume of a cone or a cut-off cone (frustum), with slant height.Cylinder Volume CalculatorVolume of a cylinder, tank or pipe from radius and height.Diameter CalculatorDiameter of a circle from its radius, circumference or area.Distance Formula CalculatorDistance between two points in 2D or 3D, exact and decimal.Endpoint CalculatorFind the missing endpoint from one endpoint and the midpoint.Hexagon CalculatorArea, perimeter, apothem and diagonals of a regular hexagon.Hypotenuse CalculatorLongest side of a right triangle from legs, an angle or the area.Midpoint CalculatorThe point exactly halfway between two points.Perimeter CalculatorDistance around a rectangle, triangle, circle, polygon or ellipse.Point-Slope Form CalculatorWrite a line as y − y₁ = m(x − x₁), then convert it.Pythagorean Theorem CalculatorFind the missing side of a right triangle with a² + b² = c².Radius CalculatorRadius of a circle from its diameter, circumference or area.Rectangular Prism Volume CalculatorVolume, surface area and diagonal of a box.Right Triangle CalculatorSolve a right triangle from two sides, or one side and an angle.Sector Area CalculatorArea of a slice of a circle from radius and angle.Slope CalculatorSlope, angle and equation of the line through two points.Slope-Intercept Form CalculatorWrite a line as y = mx + b from two points or a point and slope.Sphere Volume CalculatorVolume and surface area of a sphere from radius or diameter.Surface Area CalculatorTotal, side and base area of boxes, cylinders, spheres, cones.Trapezoid Area CalculatorArea of a trapezoid from its two parallel sides and height.Triangle Area CalculatorArea from base and height, three sides, or two sides and an angle.Triangle CalculatorSolve any triangle: missing sides, angles, area and perimeter.Volume CalculatorVolume of a box, cylinder, sphere, cone, pyramid and more.