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Sources and Methodology
How CalculatorsHub.io builds, tests, and validates every calculator: formula verification, a 6-tier source hierarchy, edge-case testing, expert review.
Math Calculators
Hexagon Calculator: Area, Apothem & Diagonals Formula
Free hexagon calculator. Enter side, area, perimeter, diagonal, or apothem to solve the rest. Regular hexagon area formula A = (3√3/2)a² with examples.
Math Calculators
Equilateral Triangle Calculator: Area, Height & Formula
Free equilateral triangle calculator. Enter side, height, area, or perimeter to solve the rest. Area formula A = (√3/4)a² with height, radii, and examples.
Math Calculators
Cone Volume Calculator: Formula, Frustum & Examples
Free cone volume calculator. Solve solid or truncated cone (frustum) volume from radius or diameter. Cone volume formula V = ⅓πr²h with worked examples.
Math Calculators
Cylinder Volume Calculator: Formula, Pipe & Capacity
Free cylinder volume calculator. Solve solid or hollow cylinder (pipe) volume from radius or diameter. Cylinder volume formula V = πr²h with liters and gallons.
Math Calculators
Area of a Triangle Calculator: Formula, 3 Sides & Height
Free area of a triangle calculator. Solve from base and height, three sides, or two sides and an angle. Triangle area formula A = ½ × b × h explained with examples.
Math Calculators
Perimeter of a Circle Calculator: Circumference Formula
Free perimeter of a circle calculator. Solve circumference from radius, diameter, or area. Circle perimeter formula p = 2πr explained with examples and a table.
Math Calculators
Pythagorean Theorem Calculator: Find a, b, or Hypotenuse
Free Pythagorean theorem calculator. Enter any two sides to find the third with a² + b² = c². Solve the hypotenuse or a leg, plus area and perimeter.
Math Calculators
Trapezoid Area Calculator: Formula, Perimeter & Angles
Free trapezoid area calculator. Solve area from two bases and height, plus perimeter and angles from the legs. Trapezoid area formula A = ((a+b)/2)h explained.