Rectangle dimensions
Use the same length unit for both dimensions.
Geometry and measurement ↗THE SUMFIZZ LIBRARY
Geometry and measurement calculators
Explore 25 free tools for geometry and measurement. Find rectangle dimensions, circle dimensions, triangle from base and height and more. Each calculator explains its inputs and method, with examples you can try using your own numbers.
THE SUMFIZZ LIBRARY
What are we working out?
Circle dimensions
Radius is half the diameter.
Geometry and measurement ↗Triangle from base and height
Height must be perpendicular to the base, not the length of a sloping side.
Geometry and measurement ↗Triangle from three sides
Heron’s formula uses all three sides.
Geometry and measurement ↗Right triangle solver
This version takes the two perpendicular legs.
Geometry and measurement ↗Trapezoid area
Take the mean of the parallel sides and multiply by the perpendicular height.
Geometry and measurement ↗Parallelogram area
Perpendicular height can differ from the sloping side length.
Geometry and measurement ↗Rhombus geometry
A rhombus has perpendicular diagonals that bisect one another.
Geometry and measurement ↗Ellipse area
Enter half-axis lengths.
Geometry and measurement ↗Regular polygon
Applies to a regular polygon with equal sides and angles.
Geometry and measurement ↗Circular sector
The central angle is measured in degrees and must be between zero and 360.
Geometry and measurement ↗Circular segment
Segment area is sector area minus the signed centre triangle.
Geometry and measurement ↗Annulus area
Subtract the inner circle area from the outer circle area.
Geometry and measurement ↗Arc length
Convert degrees to radians before multiplying by radius.
Geometry and measurement ↗Chord length
Chord length is the straight distance between arc endpoints.
Geometry and measurement ↗Rectangular prism
All dimensions must share a unit.
Geometry and measurement ↗Cylinder
A right circular cylinder, including both circular ends in surface area.
Geometry and measurement ↗Cone
A right circular cone.
Geometry and measurement ↗Sphere
Radius is measured from the sphere centre to its surface.
Geometry and measurement ↗Hemisphere
A hemisphere is half a sphere; total surface area includes the flat circular base.
Geometry and measurement ↗Cone frustum
A right circular cone frustum with parallel circular ends.
Geometry and measurement ↗Pyramid volume
Base area is in squared units, while height is in the corresponding length unit.
Geometry and measurement ↗Triangular prism
The prism has a constant triangular cross-section.
Geometry and measurement ↗Capsule volume
A capsule combines a cylinder with two hemispherical ends.
Geometry and measurement ↗Coordinate polygon
Uses the shoelace formula for a simple polygon.
Geometry and measurement ↗No matches. Try a shorter search or another category.