Estimate topsoil volume, weight, bags, and cost.
Topsoil Depth Guide
The right amount of topsoil creates the foundation for healthy lawns, gardens, and landscaping. Use this reference for recommended depths.
| Application | Recommended Depth | Notes |
|---|---|---|
| New Lawn (seed) | 4-6 inches | Provides root establishment zone |
| New Lawn (sod) | 4 inches | Level surface critical |
| Garden Beds | 6-8 inches | Blend with compost |
| Leveling Lawn | ¼-½ inch | Top dressing only |
| Raised Beds | 8-12 inches | Mix with amendments |
Frequently Asked Questions
How much topsoil do I need?
Calculate area (length × width), multiply by depth in feet, divide by 27 for cubic yards. For a new lawn over 1,000 sq ft at 4 inches deep, you need about 12.3 cubic yards.
How deep should topsoil be for a new lawn?
Apply 4-6 inches of topsoil for a new lawn from seed. For sod, 4 inches is sufficient. For gardens and flower beds, 6-8 inches provides the best growing medium.
How much does topsoil weigh?
Topsoil weighs approximately 2,000-2,400 pounds per cubic yard (about 1 ton). Wet topsoil can weigh up to 3,000 lbs per cubic yard. This is important for delivery and truck capacity planning.
How much does topsoil cost?
Bulk topsoil costs $15-50 per cubic yard depending on quality and region. Screened topsoil is $20-40/yd. Premium blended soil is $30-60/yd. Delivery adds $50-150. Bagged topsoil is $3-7 per 40 lb bag.
What is the difference between topsoil and garden soil?
Topsoil is natural surface soil — variable in quality and nutrients. Garden soil is topsoil blended with compost, peat moss, and other amendments for optimal plant growth. Garden soil costs more but performs better.
Should I use topsoil or compost?
Use topsoil to fill, level, or build up grade. Use compost to improve existing soil fertility. For best results, blend topsoil with 20-30% compost. Pure compost can be too rich and may cause drainage issues.
How many bags of topsoil equal a cubic yard?
A standard 40-pound bag of topsoil contains about 0.75 cubic feet. You need approximately 36 bags to equal one cubic yard. For large projects, bulk delivery is far more economical.
Can I put topsoil over existing grass?
Yes, for leveling and overseeding, spread 1/4 to 1/2 inch of topsoil over existing lawn. For thicker applications, the grass underneath will die. Top dressing with thin layers is a common lawn improvement technique.
What is screened topsoil?
Screened topsoil has been filtered through a screen to remove rocks, roots, debris, and clumps. It has a fine, uniform texture ideal for lawns and gardens. It costs slightly more but is much easier to work with.
When is the best time to add topsoil?
Early spring or early fall are ideal. The soil is workable, and temperatures support plant establishment. Avoid adding topsoil when the ground is frozen or waterlogged. Fall applications can settle over winter.