Square/Rectangular Surface

To find the area multiply the length times the width. Measure distance from point A to point B (length) Measure distance from point B to point C (width) To find area multiply the distance in step 1 by the distance in step 2.

Triangle Field

The formula for finding the area of a triangle is Length x Height ÷2. Measure the distance from A to B (length) Measure the distance from the base of the triangle to its highest point (height) To find area multiply the distance in step 1 by the distance in step 2. Divide area found in step 3 by 2.

An acre is 43,560 square feet. Using the measurements from figure 1, length times width = total square feet. Divide total square feet by 43,560 to find acres.

By using the formula L x W divided by 43,560, acres in any square or rectangular field can be calculated.

Chain Method of Measuring Acre

The Meter-Man model 79C Measuring Wheel measures in chains and hundredths of a chain. To determine the area simply multiply the length times the width and move the decimal point one place to the left. No division is necessary.

Countour Strip Fields

A contour with parallel sides can be treated as a rectangle. It is most accurate if the linear dimension is taken by walking down the middle of the strip. If the contour strip is uneven in width, treat the area as a rectangle and a triangle.

Measuring Hectares

Divide total area by 10,000 to determine hectares. Move decimal point four places to the left