Area, perimeter, volume and surface area.
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 below are free, run entirely in your browser, and need no sign-up.
Free circle area calculator. Enter a radius or diameter to get the area of a circle instantly using pi times r squared, right in your browser.
Free circle circumference calculator. Enter a radius or diameter to get the distance around a circle using 2 pi r, instantly in your browser.
Free rectangle area calculator. Enter length and width to get the area and perimeter of a rectangle instantly, all in your browser.
Free square area calculator. Enter the side length to get the area, perimeter and diagonal of a square instantly in your browser.
Free trapezoid area calculator. Enter the two parallel sides and the height to get the area of a trapezoid instantly in your browser.
Free parallelogram area calculator. Enter the base and height to get the area of a parallelogram instantly using base times height in your browser.
Free rhombus area calculator. Enter the two diagonals to get the area of a rhombus instantly using half the product of the diagonals in your browser.
Free ellipse area calculator. Enter the semi major and semi minor axes to get the area of an ellipse instantly using pi times a times b.
Free regular polygon area calculator. Enter the number of sides and side length to get area and perimeter of any regular polygon in your browser.
Free regular hexagon calculator. Enter the side length to get area, perimeter, and both the long and short diagonals of a hexagon instantly.
Free circle sector area calculator. Enter the radius and central angle in degrees to get the area of a pie slice sector instantly in your browser.
Free arc length calculator. Enter the radius and central angle to get the arc length of a circle using r times theta, instantly in your browser.
Free Heron formula calculator. Enter the three side lengths of a triangle to get its area using Heron formula instantly in your browser.
Free triangle perimeter calculator. Enter the three side lengths to get the perimeter and semi perimeter of a triangle instantly in your browser.
Free Pythagorean theorem calculator. Enter two sides of a right triangle to find the hypotenuse or a missing leg using a squared plus b squared.
Free right triangle calculator. Enter the two legs to get the hypotenuse, area, perimeter and both acute angles of a right triangle instantly.
Free cube volume calculator. Enter the edge length to get the volume, surface area and diagonal of a cube instantly using edge cubed in your browser.
Free rectangular prism volume calculator. Enter length, width and height to get the volume and surface area of a box instantly in your browser.
Free sphere volume calculator. Enter the radius to get the volume and surface area of a sphere instantly using four thirds pi r cubed in your browser.
Free cylinder volume calculator. Enter the radius and height to get the volume and surface area of a cylinder instantly using pi r squared h.
Free cone volume calculator. Enter the radius and height to get the volume, slant height and surface area of a cone instantly in your browser.
Free square pyramid volume calculator. Enter the base edge and height to get the volume, slant height and surface area of a pyramid in your browser.
Free box surface area calculator. Enter length, width and height to get the total surface area of a rectangular box instantly in your browser.
Free 3D distance calculator. Enter two points in x y z space to get the straight line distance between them instantly using the 3D distance formula.
Yes. Every geometry tool on yourhack.ai is completely free, with no sign-up and no usage limits.
Yes. They run in any modern web browser on phone, tablet or desktop. There is nothing to install.
Yes. These tools run entirely in your browser, so nothing you enter is uploaded to a server.
There are currently 24 free geometry tools here, and we add more regularly.