4 TOOLS TO EXPLORE
Areas and perimeters
Explore areas and perimeters tools with formulas, input guidance and worked examples.
Geometry
Circle area calculator
Find the area and circumference of a circle from its radius. Use any consistent length unit.
Open toolGeometry
Triangle area calculator
Calculate the area of a triangle from a base and its perpendicular height. Both measurements must use the same length unit.
Open toolGeometry
Triangle Perimeter Calculator
What is the perimeter of a triangle with these three sides? Enter the values below to calculate the result.
Open toolGeometry
Cube Surface Area Calculator
What is the total area of all six faces of a cube? Enter the values below to calculate the result.
Open tool