How to Calculate Landscape Rock

Landscape rock, also called gravel, is an effective way to cover walking paths or areas that will not grow grass. Landscape rock can be purchased in cubic feet, but determining the number of cubic feet needed for a project requires some measuring and calculating.

Things You'll Need

• Tape measure
• Calculator

Instructions

1. Measure the length and width of the area to be filled using a tape measure, rounding measurements to the nearest foot.

2. Multiply the length in feet by the width in feet to get the total square feet of the surface area. For example, 8 feet long by 5 feet wide equals 40 square feet.

3. Multiply the total square feet by the desired rock depth in inches. Divide by 12 to get the total cubic feet of landscape rock needed. For example, 40 square feet times 3 inches deep equals 120. Take 120 and divide by 12 to equal 10 cubic feet.

Tips & Warnings

• Calculate the amount of landscape rock for an irregular shaped area by dividing it into smaller rectangular areas. Calculate each separately and add the total together.

References

• Demesne: Calculate Footage
• The Landscape Depot: Calculator

Resources

• Read this Article in Spanish