How deep should topsoil be for a new lawn?

Minimum 4 inches for new lawns, 6 inches for best results. For garden beds: 8–12 inches. For raised beds: fill depth minus 2 inches (topsoil settles). The deeper the topsoil layer, the better the root development and drought resistance.

How much does a cubic yard of topsoil weigh?

A cubic yard of topsoil weighs approximately 2,000–2,400 lbs (1.0–1.2 tons) depending on moisture content. Wet topsoil can weigh up to 3,000 lbs per cubic yard. A standard pickup truck can carry about 1–1.5 cubic yards safely.

What is the difference between topsoil and garden soil?

Topsoil is the natural top 4–12 inches of earth, screened to remove debris. Garden soil (garden mix) is topsoil blended with compost, peat moss, and other amendments. Garden soil is richer and better for planting beds. Topsoil is cheaper and better for grading and lawn prep.

How many cubic yards of topsoil do I need?

Multiply your area in square feet by the depth in feet, then divide by 27. For example, a 300 sq ft area at 4 inches deep needs (300 × 0.33) / 27 = 3.7 cubic yards.

How much does a cubic yard of topsoil weigh?

A cubic yard of topsoil weighs approximately 2,200 lbs (1.1 tons). Moisture content affects weight — wet topsoil can weigh up to 3,000 lbs per cubic yard.

What depth of topsoil do I need?

For new lawns, 4-6 inches is recommended. For garden beds, 6-8 inches. For overseeding or topdressing, 1-2 inches is sufficient.

Is bulk or bagged topsoil cheaper?

Bulk topsoil costs $25-$50 per cubic yard delivered. Bagged topsoil costs $3-$6 per 40lb bag, or roughly $100-$200 per cubic yard — 3-4 times more expensive than bulk.

Should I mix compost with topsoil?

Yes, for most applications. A 70/30 topsoil-to-compost ratio adds nutrients and improves soil structure. Pure topsoil can compact over time, while the compost amendment keeps it loose and fertile.

How many bags of topsoil equal a cubic yard?

Approximately 36 bags of 40lb topsoil equal one cubic yard. This can vary slightly based on moisture content and bag fill accuracy.

Topsoil Calculator

Calculate topsoil needed in cubic yards and bags for lawn prep, garden beds, raised beds, and grading projects.

Topsoil Calculator

Calculate how many cubic yards of topsoil you need, with options for compost amendments and bag vs. bulk estimates.

No adsNo loginVerified formulaFree report

Enter Your Numbers

Length (ft)

Width (ft)

Depth

Amendment Mix

How This Calculator Works

How We Calculate Topsoil Volume

Converting area and depth to cubic yards uses this formula:

Cubic Yards = (Length × Width × Depth in feet) ÷ 27

Since depth is entered in inches, we first divide by 12 to convert to feet. One cubic yard weighs approximately 2,200 lbs (1.1 tons) for standard topsoil.

Amendment Mixing

A 70/30 topsoil-compost mix is the most common recommendation for garden beds and new lawns. The compost improves drainage, adds nutrients, and encourages beneficial microbial activity. A 50/50 mix is ideal for raised beds or heavily compacted clay soils.

Bulk vs. Bags

Bulk delivery is significantly cheaper for orders over 3 cubic yards. A 40lb bag covers roughly 0.75 cubic feet. You'd need about 36 bags per cubic yard, making bulk the clear winner for larger projects.

Frequently Asked Questions

Learn More

Topsoil Buying Guide: Bulk vs. Bagged

4 min read

Related Calculators

Sod Calculator

Calculate pallets and rolls of sod needed

Mulch Calculator

Determine bags or yards of mulch needed

Gravel Calculator

Estimate tons of gravel for your project

Estimates only — consult a licensed professional and verify with local building codes.

How to Calculate Topsoil

Topsoil is the foundation of healthy lawns and gardens. Whether you're establishing a new lawn, filling raised beds, or improving existing garden soil, accurate volume calculation prevents expensive over-ordering and ensures you have enough to finish the job.

The Topsoil Formula

Cubic Yards = Area (sq ft) × Depth (inches) ÷ 324
Bags (40 lb) = Cubic Yards × 36 (approximately)
Coverage per cubic yard: 324 sq ft at 1", 108 sq ft at 3", 81 sq ft at 4"

Topsoil Depth Guide

New lawn (from scratch): 4–6 inches. Deeper is better for root development.
Over-seeding / lawn repair: 1–2 inches to fill low spots and cover seed.
Garden beds: 8–12 inches for vegetables, 6–8 for flowers.
Raised beds: Fill depth minus 2 inches (soil settles 10–15%).
Grading and leveling: Varies — calculate the fill volume needed.

Types of Topsoil

Unscreened topsoil: $15–$30/cu yd. May contain rocks, roots, and clumps. Good for fill and grading.
Screened topsoil: $30–$50/cu yd. Filtered through screen to remove debris. Best for lawns.
Garden mix/blend: $40–$80/cu yd. Topsoil + compost + amendments. Best for garden beds.
Bagged topsoil: $3–$6 per 40-lb bag. Convenient for small areas but expensive per volume.

Frequently Asked Questions

How much topsoil do I need?

Area × depth ÷ 324 = cubic yards. For 1,000 sq ft at 4" deep: about 12.3 cubic yards.

How much does topsoil cost?

Bulk: $20–$60/cu yd plus $50–$150 delivery. Bagged: $3–$6 per bag but much more expensive per volume.

How deep for a new lawn?

Minimum 4 inches, ideally 6. Deeper topsoil produces healthier, more drought-resistant lawns.

How much does a cubic yard weigh?

2,000–2,400 lbs (1–1.2 tons). A pickup truck safely carries 1–1.5 cubic yards.

Topsoil vs garden soil?

Topsoil is natural screened earth. Garden soil is topsoil + compost and amendments. Use topsoil for lawns and grading, garden soil for planting beds.

Related Calculators

Sod Calculator — sod for new lawns
Mulch Calculator — mulch for beds
Cubic Yard Calculator — volume converter

Topsoil quality and weight vary by source. Ask about composition before ordering. Bulk delivery quantities may vary ±10%. Soil test recommended before amending existing soil.

How We Calculate Topsoil Volume

Converting area and depth to cubic yards uses this formula:

Cubic Yards = (Length × Width × Depth in feet) ÷ 27

Since depth is entered in inches, we first divide by 12 to convert to feet. One cubic yard weighs approximately 2,200 lbs (1.1 tons) for standard topsoil.