TrueCalcHub

Topsoil Calculator

Calculate exactly how many cubic yards or tons of topsoil you need for seeding new lawns, grading foundations, and building raised garden beds.

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Estimating Bulk Topsoil & Tonnage

Topsoil is the literal foundation of every successful landscaping project. Whether you are building massive raised vegetable gardens, grading water away from a flooded basement, or laying 6 inches of fresh loam to seed a brand-new lawn, ordering the correct amount of dirt is critical.

Our Topsoil Calculator uses precision geometry to determine exactly how many Cubic Yards and Tons your landscaping project requires, while mathematically protecting you from the dangers of soil settling.

The Yard-to-Ton Rule

Unlike mulch (which is sold strictly by volume because it is so light) and crushed gravel (which is sold by weight because it is so dense), Topsoil occupies the unique middle ground. It is sold interchangeably by the Cubic Yard and the Ton.

The landscaping industry standard conversion is incredibly simple: 1 Cubic Yard of Topsoil = 2,000 pounds (1 Ton)

Our engine calculates your project's geometric volume in Cubic Yards, and outputs the identical number in Tons. If your yard requires 12 Cubic Yards of dirt, you are ordering 12 Tons of dirt.

Note: This 1:1 ratio assumes standard damp/dry topsoil. If the dirt is completely saturated from heavy rain, it will weigh slightly more.

The Settling Factor: Why You Always Run Short

The most common mistake homeowners make when ordering dirt is failing to account for "fluff."

When a front-end loader scoops dirt at the quarry and drops it into a dump truck, it aerates the soil. When you spread that soil across your yard with a rake, it remains fluffy and full of air.

If you spread exactly 4 inches of fluffy topsoil, seed it, and then turn on your sprinklers, the water will instantly force the air out of the dirt. By the next morning, your 4-inch layer will have sunk to 3.2 inches. Your grade is ruined.

Topsoil actively settles by 10% to 20% after watering or rolling. Our calculator includes a built-in Settling Factor (defaulting to a safe 15%). When you tell the calculator you need 4 inches of dirt, it mathematically requests 4.6 inches of raw material, guaranteeing that after the rain settles the soil, you will be left with the exact 4 inches you originally planned for.

Screened vs. Unscreened: What to Buy

When calling a landscape yard for bulk delivery, they will ask if you want Screened or Unscreened topsoil.

Screened Topsoil (The Gold Standard)

Screened topsoil has been run through a massive mechanical sifter. All rocks larger than 1/2 inch, clay clumps, tree roots, and debris are removed. It looks like coffee grounds.

  • When to use: Always use Screened Topsoil if you are planting grass seed, laying sod, or building a flower bed. If you don't, your lawnmower will hit rocks every time you mow.

Unscreened Topsoil (Rough Grade)

Unscreened topsoil is raw dirt dug straight from the earth. It contains massive rocks, clumps of hardpan clay, and tree roots. It is cheap.

  • When to use: Only use unscreened topsoil if you are doing massive foundational grading (like building up a massive hill) where you intend to cover it later with a 4-inch layer of the expensive screened topsoil.

The Retail Bag Warning

If you only need to fill two small flower pots, driving to a hardware store for bags of dirt makes sense.

A standard retail bag of topsoil weighs 40 pounds. Because one Cubic Yard weighs 2,000 pounds, it takes exactly 50 bags to equal one bulk Yard.

If you are trying to plant a new lawn and our calculator says you need 3 Yards of topsoil, you would need to buy 150 individual bags of dirt. You would have to load 6,000 pounds of dirt into your car by hand, unload it by hand, and cut open 150 plastic bags. It is physically exhausting and financially ruinous due to the retail markup.

Our calculator actively monitors your 40lb bag equivalent. If your project exceeds 50 bags (1 Ton), the interface will trigger an amber financial warning, strongly advising you to call a local quarry and pay the $100 fee for a dump truck delivery.

Related Construction Estimators

If you are incorporating topsoil into a larger outdoor renovation, utilize our full suite of professional estimating tools:

Frequently Asked Questions

The landscaping industry standard is that one cubic yard of standard topsoil weighs exactly 2,000 pounds (1 Ton). If the soil is completely saturated from heavy rain, it can weigh up to 2,400 pounds, but dry/damp soil is estimated at 1 Ton per Yard.
Fill dirt is subsoil. It contains clay, rocks, and sand, but has absolutely zero organic matter or nutrients. It is used strictly to build up elevations and fill deep holes. Topsoil is the nutrient-rich, dark upper layer of the earth where organic matter decomposes. You use fill dirt for the deep base, and topsoil for the top 4-6 inches where roots grow.
Topsoil is dirt (minerals, clay, sand) mixed with a small amount of organic matter. Compost is 100% decayed organic matter (leaves, food scraps, manure) with zero actual dirt. You cannot grow a lawn in pure compost; it must be mixed with topsoil.
If you are planting grass seed or laying sod over hardpan clay, you must spread a minimum of 4 to 6 inches of high-quality screened topsoil. Grass roots need at least 4 inches of soft, nutrient-rich soil to establish a drought-resistant root system.
To top-dress an existing lawn (usually done in conjunction with core aeration and overseeding), you only need a depth of 0.25 to 0.5 inches. Applying any more than half an inch will smother and kill your existing grass blades.
When a dump truck drops 5 yards of topsoil in your driveway, it is incredibly fluffy and full of air. Once you spread it across your lawn and the first heavy rainstorm hits, the water forces the air out, and the soil level drops. If you do not order 15% extra material to account for this natural settling, your final grade will be too low.
Because 1 cubic yard equals 2,000 pounds, it takes exactly fifty (50) standard 40-pound retail bags of topsoil to equal one cubic yard (or one ton).
Unscreened topsoil is very cheap, often $15 to $20 per yard, but it contains rocks and roots. High-quality screened topsoil (pulverized to remove debris) typically costs $30 to $45 per yard. You will also need to pay a local dump-truck delivery fee, usually between $75 and $150.
A 50/50 mix is a specialized landscaping product that blends 50% screened topsoil with 50% rich organic compost. It is the absolute best product for building new raised vegetable gardens or premium flower beds, as it provides immense immediate nutrients.
A half-ton pickup truck (like an F-150 or Silverado 1500) has a payload capacity of roughly 1,500 to 2,000 pounds. Because one cubic yard of topsoil weighs 2,000 pounds, a half-ton truck can safely haul only ONE cubic yard at a time without breaking the suspension.
Yes. If you simply dump 4 inches of topsoil over hard clay, water will not drain properly between the two layers, creating a bathtub effect. You should spread 2 inches of topsoil, run a rototiller to blend it into the clay, and then spread the remaining 2 inches on top.
Screened topsoil has been passed through a massive mechanical sieve (usually 1/2 inch or 5/8 inch mesh). This process removes all rocks, clumps of clay, roots, and trash. If you are planting grass seed, you MUST buy screened topsoil, or your lawnmower will hit rocks.
Measure the length and width of the raised bed in feet to get the square footage. Multiply by the height of the bed in feet (e.g., 12 inches = 1 foot) to find the cubic feet. Divide the cubic feet by 27 to find the cubic yards required.
Not necessarily. Bagged topsoil at hardware stores is often highly processed and sterilized, which actually kills the beneficial microbes that plants need. Fresh bulk screened topsoil from a local landscape yard is 'alive' with healthy soil biology.
Building codes require the soil grade to drop 6 inches over the first 10 feet moving away from your foundation. When calculating topsoil to fix a negative grade against your house, remember to factor in 15% settling, or water will pool against your foundation after the first rain.