Playsoft

TPV/EPDM — Safety Surfaces

Area Calculations

Need help measuring areas? Choose the shape, or combination of shapes that most closely match your play area. For very irregular shapes (typical in playground areas), use the offset method below.

Irregular Shapes (Offset Method)

First measure the length of the longest axis. Divide it into equal sections. At each point, measure the distance across the area perpendicular to the length line. These are your offset lines.

Area = Distance between offsets × Sum of offset lengths

Distance between offset lines (ft)

Line C

Line D

Line E

Line F

Line G

Area: 0 sq ft

Square / Rectangle

These shapes are defined by the opposite sides being straight, parallel, and of equal length.

Area = Length × Width

Length (ft)

Width (ft)

Area: 0 sq ft

Circle

The area of a circle is found using the constant pi (3.14). Select your known measurement below.

Area = π × r²

Measure By

Value (ft)

Area: 0 sq ft

Triangle

Multiply the length of the base times the length of the height, then divide by 2.

Area = 1/2 × Base × Height

Base (ft)

Height (ft)

Area: 0 sq ft

Trapezoid

Find the average length of the parallel sides (A + B)/2, then multiply by the height.

Area = [(A + B) / 2] × Height

Side A (ft)

Side B (ft)

Height (ft)

Area: 0 sq ft

Oval

Multiply the width times the length, then multiply the result by 0.8.

Area = (Length × Width) × 0.8

Length (ft)

Width (ft)

Area: 0 sq ft

Other Formulas

Pentagon (5 equal sides)	Hexagon (6 equal sides)	Octagon (8 equal sides)
(Length of 1 side)² × 1.7	(Length of 1 side)² × 2.6	(Length of 1 side)² × 4.84