How Much Soil Do I Need?
"How much soil do I need?" is a question frequently asked by people beginning their gardening and plant cultivation adventures. Our soil calculator helps you estimate garden soil quantity — whether it is topsoil, compost, mulch, or topdressing — so you never overspend on materials.
To answer the question, follow these steps:
- Determine the length and width of the area you want to cover with soil. For example, a plot of length l = 14 yd and width b = 4 yd.
- Calculate the area by multiplying length by width. In our case, A = 14 × 4 = 56 yd². You can also type the area directly if you know it.
- Establish the depth — the thickness of the topsoil layer. Let's say it's d = 0.5 yd.
- Multiply the area by the depth to obtain the volume: 56 × 0.5 = 28 yd³.
The volume of soil required is equal to this value. Our soil calculator will display it for you in both metric and imperial units.
All Right, but How Much Is a Yard of Dirt?
To calculate the weight of a cubic yard of soil, simply multiply the volume by its density. Enter the density of your soil into the calculator — you can find it on the packaging (if bought at a garden store). Once you know the total weight, you can plan transportation.
Our dirt calculator can also help you estimate the total cost. Enter the price per unit of mass (per tonne) or per unit of volume (per cubic yard or cubic meter), and the calculator will display the total cost of the soil you need.
Metric vs. Imperial Units
This calculator supports both systems of measurement:
- Metric: meters (m), centimeters (cm), millimeters (mm) — volume in m³ and liters
- Imperial (US): yards (yd), feet (ft), inches (in) — volume in yd³ and ft³
Results are always shown in both systems so you can compare them easily.
Currencies Supported
The cost estimate supports a wide range of world currencies, including US Dollar (USD), Russian Ruble (RUB), Euro (EUR), British Pound (GBP), Canadian Dollar (CAD), Australian Dollar (AUD), and more. Select your preferred currency from the dropdown.
What Is Soil? – Soil Definition
Soil is a complex mixture of minerals, organic matter, water, and air. It forms the top layer of Earth's surface and provides the physical support and nutrients needed for plant growth. Healthy soil is a living ecosystem containing bacteria, fungi, worms, and other organisms that break down organic matter and cycle nutrients.
Basic Types of Soil
- Topsoil — the uppermost layer, rich in organic matter and nutrients. Typical density: ~1,400–1,600 kg/m³ (2,360–2,700 lb/yd³).
- Compost — decomposed organic material used to enrich soil. Density: ~700–900 kg/m³.
- Mulch — applied to the surface to retain moisture and suppress weeds. Density: ~300–600 kg/m³.
- Sandy soil — drains quickly, low in nutrients. Density: ~1,500–1,700 kg/m³.
- Clay soil — holds water well but can become compacted. Density: ~1,600–1,900 kg/m³.
- Loam — ideal balanced mixture of sand, silt, and clay. Density: ~1,300–1,500 kg/m³.
Soil Degradation vs. Soil Conservation
Soil degradation refers to the decline in soil quality through erosion, contamination, compaction, or loss of nutrients. Agricultural over-use, deforestation, and improper irrigation are the main causes.
Soil conservation involves practices that prevent degradation: crop rotation, cover cropping, reduced tillage, composting, and proper drainage. Healthy soil is a non-renewable resource on human timescales — protecting it matters for every farmer and gardener.
Practical Example
Imagine you have just built a new house and want to surround it with a grass yard. The yard is not a simple rectangle — it has a pool in the middle. You can divide it into several rectangular sections, calculate the area of each, sum them up, then multiply by the desired soil thickness.
For example, four sectors with areas of 50 yd², 6 yd², 30 yd², and 67.5 yd² give a total area of 153.5 yd². At a depth of 0.6 yd, you would need 153.5 × 0.6 = 92.1 yd³ of topsoil.
A thicker layer of topsoil allows grassroots to grow freely and helps the soil absorb and retain moisture for longer — but it also costs more. Use our calculator to find the right balance for your project and budget.