UD5 Toolkit
Sphere Volume & Surface Area Calculator – V = 4/3πr³
Compute the volume and surface area of a sphere from its radius or diameter. Instant results with units for math assignments and real-world ball sizing.
Geometry & Shape Calculators
6+ toolsMidpoint Calculator – Find the Center Between Two Points
Find the exact midpoint between two points in a 2D plane. Input (x₁, y₁) and (x₂, y₂) to get the midpoint coordinates and a visual representation.
Ellipse Area Calculator – π × a × b Formula
Find the area of an ellipse (oval) from its semi-major and semi-minor axes. Includes circumference approximation for a complete geometric analysis.
Trapezoid Area Calculator – Bases, Height & Median Formula
Calculate the area of a trapezoid using parallel sides and height. Also finds the median length. Useful for land area estimation and geometry homework.
Triangle Area Calculator – Base, Height & Heron's Formula
Find the area of a triangle using base & height, three sides (Heron's formula), or two sides and included angle. Includes all formulas and unit conversions.
Interactive Geoboard – Stretch Rubber Bands on Pegs
A virtual geoboard where you can stretch virtual rubber bands around pegs to create polygons. Explore perimeter, area, and angles.