You have a pile of topsoil, or an order on the way, and the question is how far it will go. This topsoil coverage calculator works backward from the soil you have: enter the volume and the depth you plan to spread, and it returns the area that volume covers.
It is the reverse of our main topsoil calculator, which starts from an area and a depth and returns the volume you need to buy. Use this one when the soil is already decided and the question is how much ground it covers.
Below you will find the coverage formula, a worked example, coverage charts in US and metric units, and a guide to the right calculator for each type of project.
Topsoil Coverage Calculator
Enter how much topsoil you have and how deep you will spread it. The calculator shows how much area it covers.
How the Topsoil Coverage Calculator Works
The calculator converts your volume to cubic feet, converts your depth to feet, and divides one by the other. It accepts cubic yards, cubic feet or cubic meters for the volume, and inches or centimeters for the depth.
The result is shown in square feet and square meters, along with the same volume spread at other common depths.
The Coverage Formula
Coverage Area (sq ft) = Volume (cu ft) ÷ Depth (ft)
Where:
- Volume is the amount of topsoil in cubic feet. One cubic yard is 27 cubic feet, and one cubic meter is about 35.31 cubic feet.
- Depth is the spreading depth in feet. Divide inches by 12, or centimeters by 30.48.
Worked Example
Suppose you have 5 cubic yards of topsoil and want to spread it 3 inches deep.
Volume = 5 × 27 = 135 cubic feet. Depth = 3 ÷ 12 = 0.25 feet.
Coverage Area = 135 ÷ 0.25 = 540 square feet. Therefore 5 cubic yards covers about 540 square feet at 3 inches deep.
In metric the same idea works directly: Coverage Area (sq m) = Volume (cu m) ÷ Depth (m). Two cubic meters spread 5 centimeters (0.05 meters) deep covers 2 ÷ 0.05 = 40 square meters.
Topsoil Coverage Charts
Square Feet per Cubic Yard
One cubic yard covers 324 square feet at 1 inch deep. Doubling the depth halves the area.
| Depth | Area covered by 1 cubic yard |
|---|---|
| 1 inch | 324 sq ft |
| 2 inches | 162 sq ft |
| 3 inches | 108 sq ft |
| 4 inches | 81 sq ft |
| 6 inches | 54 sq ft |
| 12 inches | 27 sq ft |
Square Meters per Cubic Meter
In metric, one cubic meter covers 100 square meters at 1 centimeter deep.
| Depth | Area covered by 1 cubic meter |
|---|---|
| 1 cm | 100 sq m |
| 2 cm | 50 sq m |
| 5 cm | 20 sq m |
| 10 cm | 10 sq m |
| 15 cm | 6.7 sq m |
Coverage From Tons or Bags
This calculator takes a volume, so convert other units first. If your supplier sells by the ton, use the Topsoil Tons Calculator to turn tons into cubic yards, then enter the cubic yards here.
If you are buying bags, multiply the number of bags by the volume printed on each bag. The bags of topsoil calculator shows how bag sizes relate to cubic yards.
Why Real Coverage Comes Up Short
The calculated area is a maximum, because real ground is not a perfect flat rectangle.
Depth Is the Biggest Factor
People picture the area and forget the depth. Because coverage halves each time the depth doubles, a small change in depth moves the result more than any other input.
Settling and Uneven Ground
Soil settles after it is spread and watered, and slopes and dips take up extra soil. Both mean you will usually cover a little less than the calculated area.
If the area is irregular, measure it in sections instead of treating it as one shape.
Which Calculator Should You Use?
Coverage depends on the shape of the area, the type of project and how you buy the soil. Pick the tool that matches your situation.
By Area and Shape
Rectangular Areas
If you know the length, width and depth and want the volume to buy, start with the main topsoil calculator. For a conversion that starts from square footage, use the square feet to cubic yards calculator.
Round and Irregular Areas
Use the Circular Area Topsoil Calculator for round beds and tree rings. For several zones or an L-shaped lawn, the Multi-Area Topsoil Calculator adds the sections for you.
By Project Type
Lawns
The lawn topsoil calculator sizes soil for a new lawn or a repair. The sod topsoil calculator covers the base under sod, and the topdressing calculator covers thin layers over an established lawn.
Raised Beds
The raised bed soil calculator gives cubic feet, cubic yards and bag counts for a bed.
By How You Buy
Once you know the volume, use the bags of topsoil calculator for bagged soil or the topsoil truckload calculator to count truckloads for bulk delivery.
The topsoil cost calculator estimates material and delivery cost for your order.
Frequently Asked Questions
How much area does 1 cubic yard of topsoil cover?
One cubic yard covers about 324 square feet at 1 inch deep, 162 square feet at 2 inches and 108 square feet at 3 inches.
How do I calculate how far my topsoil will go?
Multiply cubic yards by 27 to get cubic feet, then divide by the depth in feet. For example, 5 cubic yards at 3 inches is 135 ÷ 0.25 = 540 square feet.
How many square feet does 10 cubic yards of topsoil cover?
At 2 inches deep, 10 cubic yards covers about 1,620 square feet (10 × 162). At 4 inches deep it covers about 810 square feet.
How much area does a cubic meter of topsoil cover?
One cubic meter covers 100 square meters at 1 centimeter deep, 20 square meters at 5 centimeters and 10 square meters at 10 centimeters.
Does the type of soil change the coverage?
Not the volume math, which depends only on volume and depth. Moisture, compaction and settling change how much usable soil you end up with, so real coverage can be a little lower.
How do I work out coverage for an irregular yard?
Break the space into regular shapes such as rectangles and circles, and calculate each one separately. The multi-area topsoil calculator does this for you.
Can I enter tons instead of cubic yards?
Not directly. Convert tons to cubic yards first with the Topsoil Tons Calculator, then enter the cubic yards here.
Final Thoughts
Coverage comes down to one relationship between volume, area and depth. Enter the soil you have and the depth you plan to spread, and the calculator returns the area it will cover.
If you are still deciding how much to buy, start from the area with the main topsoil calculator instead.
Daniel
Founder & Editor – TopSoilCalcOnline.com
Daniel is the founder and primary editor of TopSoilCalcOnline.com, a practical resource built to help homeowners, landscapers, and contractors accurately calculate topsoil, compost, and soil mix requirements. With hands-on experience in lawn preparation, raised beds, topdressing, and bulk soil planning, Daniel focuses on turning complex volume calculations into simple, reliable tools. Every calculator and guide on this site is designed to reduce material waste, prevent over-ordering, and help users plan landscaping projects with confidence and precision.