The short version: Measure each bed’s length × width in feet, pick a depth (3–4″ is ideal), then use Sq Ft × Depth ÷ 324 = Cubic Yards. Prefer to skip the math? Use our Mulch Coverage Calculator.
If you have ever stood in your yard in Bellevue, Kirkland, or Redmond wondering how many yards of bark or mulch you actually need, you are not alone. Ordering too little means a second trip; ordering too much means a pile taking up your driveway. The good news: the math is simple once you break it into three steps.
Step 1: Measure Your Space
You do not need fancy tools — just your feet. Step off the length and width of each bed and jot the numbers down. Most yards are not perfect rectangles, so break curvy or oddly shaped areas into smaller squares and rectangles, then add them together.
Length (ft) × Width (ft) = Square Feet
Step 2: Decide How Deep
Depth matters as much as area. For most landscapes we recommend a total depth of 3 to 4 inches — the sweet spot for weed control and long-lasting coverage. Vegetable rows and lighter functional mulch can go closer to 2 inches.
Step 3: Do the Yardage Math
Material is sold by the cubic yard, so convert your square footage with this formula:
Square Feet × Depth (inches) ÷ 324 = Cubic Yards
Here are two real examples:
Quick Coverage Reference
A fast rule of thumb for how far one cubic yard stretches at common depths:
Good to know: Bark King has a 10 cubic yard minimum delivery, so if your project comes in under that, it is a great time to refresh the whole yard at once.
Let the Calculator Do the Work
Do not want to do the math by hand? Use our free Mulch Coverage Calculator. Plug in your length, width, and depth, and it tells you exactly how many cubic yards to order.
Why Getting the Amount Right Matters
Order short and you will have thin, patchy coverage that lets weeds through. Order too much and you are stuck moving a pile by wheelbarrow. Getting the number right the first time saves time, money, and your back — especially on the larger properties we see throughout Sammamish and the Greater Eastside. Not sure whether bark or mulch is the right pick? Our bark vs. mulch guide breaks it down.
Frequently Asked Questions
Skip the Shovels — Call the King
Once you know your yardage, let Bark King’s blower truck install it for you: fast, even coverage with no backache and no headache. Call us today at 425-814-6444 and we will help you dial in the exact amount and material for your project.
Call us today!
425-814-6444
Let's plan your next project!
Our office staff is exceptionally knowledgeable and experienced. We work tirelessly to ensure that the experience our clients have is positive! Understanding client's needs allows us to provide assistance in selecting the appropriate material.
We schedule jobs in a manner that ensures the entire process goes smooth and deadlines are met. We understand the unique requirements of individual job sites!