Formula:

Area = 0.8 L x W

A = Area

L = Length

W = Width at midpoint

Example:

A = 0.8 x 60 feet x 40 feet

A = 1,920 square feet

(within 5% accuracy)

Formula:

Area =3.14 R2

R = Radius

Example:

A = 3.14 x 30 feet x 30 feet

A = 1,414 square feet

The half-circle backyard has a radius of 30 feet. A complete circle would be 302 or 3.14 x 30 ft. x 30 ft. = 2,826 sq.ft. Half would be 1,413 sq.ft.

Sod needed: A + B + C (1,300 sq.ft.) + D (1,413 sq.ft.) = 2,713 sq.ft.

Formula:

Measure the length of the longest axis across the area. Every 10 feet along the length, measure the width of the area at right angles to the length line. Total all widths and multiply by 10.

Example:

A = 40 ft. + 30 ft. + 50 ft. x 10

A = 1200 square feet

Sod Needed: A + B + C (1,300 sq.ft.) + D (see above) = 2,500 sq.ft.

Formula:

Area = 0.5 x (A + B) x H

A = one parallel side

B = second parallel side

H = Height perpendicular to two parallel sides

Example:

Area = 0.5 x A + B (100 ft.) x H (30 ft.) = 1,500 sq.ft.

Formula:

Divide the area into sections of regular geometric shapes, calculate the area of individual sections, then total

Example:

• Triangle: 0.5 x B (15ft.) x H (30 ft.) = 225 sq.ft.
• Rectangle: 30 ft. x 45 ft. = 1,350 sq.ft.
• Circle: (3.14) x 9 x 9 = 258 sq.ft. + 2 = 127 sq.ft.

Sod Needed: 225 sq.ft. + 1,350 sq.ft. + 127 sq.ft. = 1,702 sq.ft.