Geometry Calculators
Calculate area, perimeter, volume, and surface area for circles, rectangles, triangles, cylinders, spheres, and more.
Geometry calculators support schoolwork, construction estimates, crafts, home projects, and quick shape measurements.
Why this category matters
Geometry calculators group related formulas so visitors can compare nearby tools instead of landing on a single isolated calculator page.
How to choose a calculator
Pick the task that matches the result you need, then review the formula shown on the calculator page. Related tools are linked when another calculation may fit better.
Accuracy guidance
Enter the original values carefully and round after the result is shown. For health, finance, construction, or schoolwork, verify the formula matches the method your task expects.
What to open next
Open the calculator that matches the result label you need. If the first result is not the right fit, use the category list and related links to move to a nearby formula without starting your search over.
Geometry tools
Rectangle Area Calculator
Compute area and perimeter of a rectangle.
Formula: Area = length * width, Perimeter = 2 * (length + width)
Triangle Area Calculator
Find triangle area from base and height.
Formula: Area = (base * height) / 2
Circle Area Calculator
Compute area and circumference of a circle from radius.
Formula: Area = pi * r^2, Circumference = 2 * pi * r
Trapezoid Area Calculator
Calculate trapezoid area using both bases and height.
Formula: Area = ((base1 + base2) * height) / 2
Cube Volume Calculator
Find cube volume from side length.
Formula: Volume = side^3
Cylinder Volume Calculator
Calculate cylinder volume from radius and height.
Formula: Volume = pi * radius^2 * height
Sphere Volume Calculator
Calculate the volume of a sphere from its radius.
Formula: Volume = (4/3) * π * r³
Cone Volume Calculator
Calculate the volume of a cone from radius and height.
Formula: Volume = (1/3) * π * r² * h
Rectangular Prism Volume Calculator
Calculate volume of a rectangular prism (box).
Formula: Volume = length * width * height
Rectangular Prism Surface Area Calculator
Calculate the surface area of a rectangular prism.
Formula: Surface Area = 2(lw + lh + wh)
Sphere Surface Area Calculator
Calculate the surface area of a sphere.
Formula: Surface Area = 4 * π * r²
Cube Surface Area Calculator
Calculate the surface area of a cube.
Formula: Surface Area = 6 * side²
Cylinder Surface Area Calculator
Calculate the total surface area of a cylinder.
Formula: Surface Area = 2πr² + 2πrh