MATHEMATICS & STATISTICS
Geometry
Triangle Area Calculator
Calculate a triangle's area from base and height, from three sides with Heron's formula, or from two sides and the included angle.
Circle Sector Area Calculator
Find a circle sector's area and arc length from the radius and angle in degrees or radians, plus the chord length, perimeter and segment area.
Pythagorean Theorem Calculator
Solve a² + b² = c² for the hypotenuse or a missing leg.
Volume of a Sphere Calculator
Calculate a sphere's volume and surface area from its radius or diameter, or work back to the radius from the volume or area, in any unit.