Geometry & Measurement calculators & tools
Calculate common two-dimensional and three-dimensional geometry including circles, triangles, coordinates, cylinders, spheres, boxes and ellipses.
Circle Calculator
Calculate circle diameter, circumference and area from radius.
Open tool →Geometry & MeasurementTriangle Calculator — Sides, Area & Angles
Validate three side lengths and calculate perimeter, Heron area and all three angles.
Open tool →Geometry & MeasurementDistance Between Two Points Calculator
Calculate Δx, Δy and straight-line distance between two Cartesian points.
Open tool →Geometry & MeasurementSlope Calculator
Calculate slope, rise/run and line equation through two points.
Open tool →Geometry & MeasurementMidpoint Calculator
Find the midpoint and segment length between two Cartesian points.
Open tool →Geometry & MeasurementCylinder Volume & Surface Area Calculator
Calculate cylinder volume, lateral area and total surface area.
Open tool →Geometry & MeasurementSphere Volume & Surface Area Calculator
Calculate sphere diameter, surface area and volume from radius.
Open tool →Geometry & MeasurementRectangular Prism Calculator
Calculate box volume, surface area and space diagonal.
Open tool →Geometry & MeasurementEllipse Calculator
Calculate ellipse area, approximate perimeter, focal distance and eccentricity.
Open tool →About these geometry & measurement tools
Geometry tools use standard Euclidean formulas and report units generically so the same calculator can work with inches, feet, meters or any other consistent measurement system.
Every utility includes an interactive result plus an explanation, example, common questions and links to closely related calculators.