Serving you since 1928

Pebbles & Cobbles

Decorative pebble stones and rock in your yard is an ideal way to add drama, whimsy, sophistication, or visual interest.





Rainbow Pebbles

Rainbow pebbles and cobbles are a mixture of white, pink, red, green, blue, and purple that are ideal for water features and landscape accents. Available in the following sizes:
•    3/8” Pebbles
•    3/4” Pebbles
•    1”-1½” Pebbles
•    3” Pebbles
•    3”- 10” Cobbles

Crushed Rainbow Rock

Light gray when dry. When wet, these show a beautiful range of colors. Great for areas where round rock is not ideal. Available in two sizes:
•     3/4″
•     1 – 1 1/2″

Black Pebbles

Light gray in color when dry. When wet, Black Pebbles shine with a dramatic color that adds depth to water features.

Calculating Material


1,728 cubic inches = 1 cubic foot
27 cubic feet = 1 cubic yard
7.5 cubic yards = 1 unit
One 5 gallon bucket = 0.67 cubic foot


144 square inches = 1 square foot
9 square feet = 1 square yard
43,560 square feet = 1 acre

How much area will a cubic yard cover at a given depth?

At 1/2″ deep, 640 square feet
At 1″ deep, 324 square feet
At 2″ deep, 162 square feet
At 3″ deep, 108 square feet
At 4″ deep, 81 square feet
At 6″ deep, 54 square feet
At 12″ deep, 27 square feet

Material weights

Please note weights can vary due to moisture content.
Bark Mulch: 500-800 lbs/cubic yard
Compost: 800-1,100 lbs/cubic yard
Soils: 1,300-2,000 lbs/cubic yard
Gravel: 2,000-2,500 lbs/cubic yard
Sand: 2,000-2,300 lbs/cubic yard


Volume of a Rectangle


Volume of a circle


Volume of a Triangle

Our estimate planning tools are provided for your reference and convenience. Highway Fuel is happy to help, please call us at 503-363-6444 or email for assistance.