Landscape Volume, Percent, and Ratio Calculations

Landscape Volume, Percent, and Ratio Calculations

Obj. 2.01 Apply procedures to perform calculations used in estimates and quotes.

Calculating volume

Many times in landscaping you see length and width in feet, but depth is typically in inches. 

ALWAYS convert inches to feet first (divide by 12 because 12 inches= 1 foot). 

Then multiply your 3 numbers (L x W x H). 

If it asks you for cubic yards instead of feet (most ot the time), divide by 27 (3 feet = 1 yard and 3x3x3=27). 

Open Ended

How many cubic feet of peat moss are needed to amend a flower bed that is 4" deep, 12' long and 6' wide? (remember to convert 4 inches to feet before multiplying!)

Open Ended

If 125 out of 150 seeds germinate, what is the germination rate (percentage)?

Open Ended

If a pesticide label recommends 1 gallon of chemical per 100 gallons of water, what is the ratio of chemical to water?

Open Ended

If a landscaping job takes 8 hours and labor costs $9.00 per hour, what is the labor cost for the job?