CALCULATIONS
Download Our Yardage Calculation Sheet

YARDAGE

Best for soils, mulches, and HPB

yards = Area x Depth / 12 / 27

Area (in Square Feet) x Depth (in inches)
divide by 12 (to get cubic feet)
divide by 27 = cubic yards

TONNAGE

Best for sand, gravel, and limestone

tonnes = Area x Depth / 200 x 1.103

Area (in Square Feet) x Depth (in inches)
divide by 200
multiply by 1.103 = metric tonnes

AREA

Square/Rectangle = Length (ft) x Width (ft)               

Triangle (Right Angled) = Base (ft) x Height (ft) divided by 2  

Circle = Pi (3.14) x radius (r, diameter divided by 2) x radius

SOIL, MULCH, HPB

Approximate coverage per cubic yard

1” Thick..........325 square feet
2” Thick..........162 square feet
3” Thick..........108 square feet
4” Thick.............81 square feet
5” Thick.............65 square feet
6” Thick.............54 square feet
8” Thick.............40 square feet
10” Thick..........32 square feet
12” Thick..........27 square feet

COMPACTED GRAVEL

Approximate coverage per cubic yard

1” Thick..........235 square feet
2” Thick..........117 square feet
3” Thick.............79 square feet
4” Thick.............59 square feet
5” Thick.............47 square feet
6” Thick.............39 square feet
12” Thick..........20 square feet

RANDOM FLAGSTONE

Approximate coverage per ton (2000 Pounds)

1/2” Thick....................................225 sqft
3/4” Thick.........................125-150 sqft
1-1 1/4” Thick................100- 110 sqft
1 1/2” - 1 3/4” Thick........70– 85 sqft
2”-3” Thick............................50– 60 sqft

ARMOUR STONE WALLS

Length (ft) x Width (ft) x Height (ft) = Cubic Feet
Cubic Feet x Weight of Rock Per Cubic Foot = Wall Weight (lbs)

Example:

Limestone Boulder (165lbs/cuft):
100 feet long, 4 feet wide, 2.5 feet high

100 x 4 x 2.5 = 1000 cubic feet

Step Two:
We know: limestone has about 165 pounds per cubic foot,
So: we can multiply the cubic footage by 165 pounds.
1000 cubic feet x 165 lbs = 165,000 pounds

Step Three:
Finally, to calculate the cost you can:
multiply the total number of pounds
by the cost per pound found on our price sheets

CONVERSIONS

Pounds and Kilograms

Pounds (Lbs) to Kilograms (Kg):
# in Pounds divided by 2.204

Kilograms (Kg) to Pounds (Lbs):
# in Kilograms multiplied by 2.204

HOW MUCH DOES A ROCK WEIGH?

Each cubic foot of rock weighs approximately...

Limestone......165 pounds / cubic foot
Granite............175pounds / cubic foot
Sandstone......150pounds / cubic foot