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Geometry Tools

Area, perimeter, volume and surface area. 24 free tools, no sign-up.

Circle Area CalculatorEnter a radius or diameter to get the area of a circle instantly using pi times r squared, right in your browser.Circle Circumference CalculatorEnter a radius or diameter to get the distance around a circle using 2 pi r, instantly in your browser.Rectangle Area CalculatorEnter length and width to get the area and perimeter of a rectangle instantly, all in your browser.Square Area CalculatorEnter the side length to get the area, perimeter and diagonal of a square instantly in your browser.Trapezoid Area CalculatorEnter the two parallel sides and the height to get the area of a trapezoid instantly in your browser.Parallelogram Area CalculatorEnter the base and height to get the area of a parallelogram instantly using base times height in your browser.Rhombus Area CalculatorEnter the two diagonals to get the area of a rhombus instantly using half the product of the diagonals in your browser.Ellipse Area CalculatorEnter the semi major and semi minor axes to get the area of an ellipse instantly using pi times a times b.Regular Polygon Area CalculatorEnter the number of sides and side length to get area and perimeter of any regular polygon in your browser.Hexagon CalculatorEnter the side length to get area, perimeter, and both the long and short diagonals of a hexagon instantly.Sector Area CalculatorEnter the radius and central angle in degrees to get the area of a pie slice sector instantly in your browser.Arc Length CalculatorEnter the radius and central angle to get the arc length of a circle using r times theta, instantly in your browser.Heron Formula CalculatorEnter the three side lengths of a triangle to get its area using Heron formula instantly in your browser.Triangle Perimeter CalculatorEnter the three side lengths to get the perimeter and semi perimeter of a triangle instantly in your browser.Pythagorean Theorem CalculatorEnter two sides of a right triangle to find the hypotenuse or a missing leg using a squared plus b squared.Right Triangle CalculatorEnter the two legs to get the hypotenuse, area, perimeter and both acute angles of a right triangle instantly.Cube Volume CalculatorEnter the edge length to get the volume, surface area and diagonal of a cube instantly using edge cubed in your browser.Rectangular Prism Volume CalculatorEnter length, width and height to get the volume and surface area of a box instantly in your browser.Sphere Volume CalculatorEnter the radius to get the volume and surface area of a sphere instantly using four thirds pi r cubed in your browser.Cylinder Volume CalculatorEnter the radius and height to get the volume and surface area of a cylinder instantly using pi r squared h.Cone Volume CalculatorEnter the radius and height to get the volume, slant height and surface area of a cone instantly in your browser.Pyramid Volume CalculatorEnter the base edge and height to get the volume, slant height and surface area of a pyramid in your browser.Surface Area of a Box CalculatorEnter length, width and height to get the total surface area of a rectangular box instantly in your browser.3D Distance CalculatorEnter two points in x y z space to get the straight line distance between them instantly using the 3D distance formula.

Free geometry tools: area, perimeter, volume and surface area for circles, triangles, spheres, cylinders and more, plus the Pythagorean theorem and Heron formula. All 24 tools are free, run entirely in your browser, and need no sign-up.

Frequently asked questions

Are these geometry tools free?

Yes. Every geometry tool on yourhack.ai is completely free, with no sign-up and no usage limits.

Do these geometry tools work on mobile?

Yes. They run in any modern web browser on phone, tablet or desktop. There is nothing to install.

Is my data private?

Yes. These tools run entirely in your browser, so nothing you enter is uploaded to a server.

How many geometry tools are there?

There are currently 24 free geometry tools here, and we add more regularly.

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