Area · Calculators
4 tools in this section, each with a documented method and sources.
Circle areaTier 0Enter the radius, diameter, circumference or area to get all the others.Triangle areaTier 0Use base and height, or enter all three sides when you don't know the height.Rectangle areaTier 0Enter length and width to get the area, the perimeter and the diagonal.Trapezoid areaTier 0Enter both parallel sides and the height between them.