# how do I calculate how many yards of mulch I need for my landscape?

### 8 Answers

- 1 decade agoFavorite Answer
Length x Width x Desired Depth and divide by 27 for Cubic Yard.

For example if your planter is 20 foot long and 10 foot wide and you wish to have 4 inches of mulch your formula calculation would be: (20 x 10 x .33)/27 = 2.44 so you would order 2.5 Cubic Yards.

- Anonymous1 decade ago
One thing I always find curious is many of us can’t calculate how much mulch we need so try this formula. Multiply the length times the width of the area to be mulched times the height of the mulch and that will give you cubic feet. Divide that figure by 27 (there are 27 cubic feet in a yard) and that will give you cubic yards, then round that figure up. The variable in the formula is the mulch height, so use .08 for a one inch height, .l6 for two inches and .25 for three inches. Not being able to calculate mulch when I started cost me a lot of money! I finally figured out the hand measuring method did not work. So, you have an area that’s 50' by 125' and want to add mulch at a three inch height. Okay, multiply 50 x 125 x .25 = 1,563cf divided by 27 = 57.87 cubic yards, rounded up to 58. So, to equate to a yard using two cube bags, you need l3.5 of them; three cube bags, you’d need nine bags, and pine straw, about 13 bales. Try these ideas. You’ll like them!

- AnOrdinaryGuyLv 51 decade ago
The mulch should be spread about 3 inches thick. So 3 inches of mulch spread over 1 square foot is 1/4 of a cubic foot.

Measure your garden in feet, length x width, and calculate the number of square feet you get. Next, multiply that number by 1/4. This gives you the number of cubic feet of mulch you will need. (if you have 100 square feet of garden you will need 25 cubic feet of mulch.) There are 27 cubic feet of mulch in 1 cubic yard (3x3x3). So if you need 13 cubic feet, you order 1/2 of a "yard", if you need 54 cubic feet you order 2 "yards"; if you need 25 cubic feet, order 1 full "yard".

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- 1 decade ago
Many of the home improvment stores sell a calculator for doing just that. It's about 15 bucks and it's handy as all get out. Does concrete, mulch, rock, sand, paint, wood, fence, lumber..all kinds of stuff. In the tool dept. at Home Depot and Lowes..... Let's you calculate how many inches of mulch you want, how wide, how long.... it's designed exactly for that. If you don't want to buy one.... I"m sure you can look up on the internet to find mulch calculator somewhere...!!

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- LaneLv 41 decade ago
Imagine the bag of mulch laying unopened on the ground. That is the area it will cover (thats a good thick layer)

So, however many bags (whatever size they are) when layed out flat will cover the area is how many bags you need. Its easy to estimate by visualizing the bags for smaller areas.

Or, you can easily figure it the way you do concrete LENGTH x WIDTH x THICKNESS divided by 27.

27 is the number of cubic feet per yard

- Anonymous1 decade ago
call your bf and ask him.