Area, volume, surface area and shape calculators. — 16 free tools.
Find the area, perimeter and diagonal of a rectangle.
★Find the area, perimeter and diagonal of a square.
★Find the area of a parallelogram.
★Find the area of a rhombus from its diagonals.
★Find the area of a trapezoid.
★Find the area and approximate perimeter of an ellipse.
★Find the area and arc length of a circle sector.
★Find the area and perimeter of a regular polygon.
★Find the volume and surface area of a cone.
★Find the volume and surface area of a cylinder.
★Find the volume and surface area of a sphere.
★Find the volume of a rectangular pyramid.
★Find the volume, surface area and diagonal of a cube.
★Find the distance between two points on a plane.
★Find the midpoint between two points.
★Find the slope and angle of a line between two points.
Browse CalculatorFC tools in this topic. Each calculator includes a clear formula, examples, FAQs, schema markup, related internal links and practical guidance for users, Google Search and AI answer engines.
Author: CalculatorFC Editorial Team
Reviewed by: CalculatorFC Accuracy Review Desk
Last updated: June 23, 2026
Editorial policy: We explain formulas, assumptions, limitations and examples in plain language and update pages when methods, rates or standards change.
Fact-checking policy: Calculator formulas are reviewed against standard mathematical, financial, scientific or public reference methods where applicable.
Sources: Standard formulas, official government references where relevant, public methodology references and calculator-specific documentation.
Trust links: About Us · Contact · Privacy Policy · Terms · Disclaimer