UseCalcPro
Home
MathFinanceHealthConstructionAutoPetsGardenCraftsFood & BrewingTools
Blog
  1. Home
  2. Garden

Topsoil Calculator — Cubic Yards, Bags & Cost

Calculate exactly how much topsoil your project needs

Cubic Yards Needed

3.70

Bags (40 lb)

100

Weight

8,148 lbs

Cost (bulk)

$93–$148

Fresh lawn installation over bare soil

Topsoil Needed

3.70

cubic yards

Volume

100 cu ft

Weight

8,148 lbs

(4.07 tons)

40 lb Bags100

At ~1 cu ft per bag

Cost Estimates

Bagged ($5–$7/bag)
$500–$700
Bulk ($25–$40/cu yd)
$93–$148

Bags vs Bulk Delivery

Bagged (avg)$600
Bulk (avg)$121

Bulk delivery saves significantly for orders over 1 cu yd. Add $50–$100 for delivery fee.

Volume Details

Area300 sq ft
Depth4"
Cubic Feet100.0
Cubic Yards3.70

Example Calculations

1New Lawn — 1,000 sq ft at 4" Deep

Inputs

Area ModeCustom sq ft
Area1,000 sq ft
Depth4 inches
PurposeNew Lawn

Result

Topsoil Needed12.35 cu yd
Volume333.3 cu ft
Weight27,160 lbs (13.58 tons)
40 lb Bags334 bags
Bulk Cost$309–$494

Volume = 1,000 × 4/12 = 333.3 cu ft = 12.35 cu yd. Weight = 12.35 × 2,200 = 27,160 lbs. Bags = ceil(333.3/1) = 334 bags. Bulk at $25–$40/cu yd = $309–$494.

2Garden Bed — 20×15 ft at 8" Deep

Inputs

Area ModeL × W
Length20 ft
Width15 ft
Depth8 inches
PurposeGarden Bed

Result

Topsoil Needed7.41 cu yd
Volume200 cu ft
Weight16,296 lbs (8.15 tons)
40 lb Bags200 bags
Bulk Cost$185–$296

Area = 20 × 15 = 300 sq ft. Volume = 300 × 8/12 = 200 cu ft = 7.41 cu yd. Weight = 7.41 × 2,200 = 16,296 lbs. Bulk at $25–$40/cu yd = $185–$296.

3Lawn Top-Dressing — 2,000 sq ft at 0.5" Deep

Inputs

Area ModeCustom sq ft
Area2,000 sq ft
Depth0.5 inches
PurposeTop-Dressing

Result

Topsoil Needed3.09 cu yd
Volume83.3 cu ft
Weight6,790 lbs (3.40 tons)
40 lb Bags84 bags
Bulk Cost$77–$124

Volume = 2,000 × 0.5/12 = 83.3 cu ft = 3.09 cu yd. Weight = 3.09 × 2,200 = 6,790 lbs. Bulk at $25–$40/cu yd = $77–$124.

Frequently Asked Questions

Q

How much topsoil do I need for a new lawn?

For a new lawn, apply 4–6 inches of topsoil over the area. A 1,000 sq ft lawn at 4 inches deep needs 12.3 cubic yards of topsoil, weighing about 13.5 tons. At 6 inches deep, you need 18.5 cubic yards.

  • 1,000 sq ft at 4" deep = 333 cu ft = 12.3 cu yd — about $310–$495 bulk
  • 1,000 sq ft at 6" deep = 500 cu ft = 18.5 cu yd — about $465–$740 bulk
  • New lawns need 4–6" of topsoil tilled into existing soil for proper root establishment
  • Order 10–15% extra to account for settling and uneven ground
  • Bulk delivery saves 50–70% vs bagged for orders over 3 cubic yards
Lawn SizeDepth 4"Depth 6"Bulk Cost (avg)
500 sq ft6.2 cu yd9.3 cu yd$155–$370
1,000 sq ft12.3 cu yd18.5 cu yd$310–$740
2,000 sq ft24.7 cu yd37.0 cu yd$620–$1,480
5,000 sq ft61.7 cu yd92.6 cu yd$1,545–$3,700
Q

How deep should topsoil be for a garden bed?

Garden beds need 8–12 inches of topsoil for most vegetables and flowers. Shallow-rooted plants like lettuce need 6–8 inches, while root vegetables and tomatoes prefer 10–12 inches for full root development.

  • Herbs and lettuce: 6–8 inches of topsoil is sufficient
  • Most flowers and vegetables: 8–10 inches provides good growing depth
  • Root crops (carrots, potatoes): 10–12 inches needed for full root growth
  • Top-dressing existing beds: 0.5–1 inch annually to replenish nutrients
  • Mix topsoil with 25–30% compost for best nutrient content
Q

What is the difference between topsoil and fill dirt?

Topsoil is the nutrient-rich top 4–12 inches of earth, containing organic matter that supports plant growth. Fill dirt is subsoil from below the topsoil layer — it lacks nutrients and is used for grading and filling, not growing.

  • Topsoil: 5–10% organic matter, supports plant growth, $25–$40 per cubic yard
  • Fill dirt: minimal organic content, used for grading, $8–$15 per cubic yard
  • Never use fill dirt alone for planting — it compacts easily and drains poorly
  • For raised beds, topsoil is essential; fill dirt can go underneath for volume
  • Screened topsoil has rocks and debris removed, costs $5–10 more per yard
PropertyTopsoilFill Dirt
Organic Matter5–10%<1%
Plant GrowthExcellentPoor
Cost/cu yd$25–$40$8–$15
Best UseLawns, gardensGrading, filling
Q

Is it cheaper to buy topsoil in bags or bulk?

Bulk topsoil at $25–$40 per cubic yard is significantly cheaper than bagged for large projects. Bagged topsoil costs $5–$7 per 40 lb bag (about 1 cu ft), which translates to $135–$189 per cubic yard. Bulk saves 60–80% on material cost.

  • Under 1 cu yd: bags are more practical ($135–$189 per cu yd in bags)
  • 1–3 cu yd: bulk starts saving money even with delivery fee ($50–$100)
  • Over 3 cu yd: bulk saves $100–$500+ compared to bags
  • Bulk delivery dumps in driveway — plan for wheelbarrow distribution
  • Some suppliers offer 'super sack' (1 cu yd bags) as a middle option

Related Calculators

Raised Bed Calculator

Calculate soil and lumber for raised garden beds

Compost Calculator

Calculate compost ratios for healthy soil

Lawn Seed Calculator

Calculate grass seed for new or overseeded lawns

Soil Amendment Calculator

Plan soil amendments for optimal growing conditions

Soil Calculator

Calculate how much soil you need for raised beds, gardens, and landscaping. Get cubic yards, bags needed, and cost estimates for your project. Compare options.

Landscape Fabric Calculator \u2014 Rolls, Pins & Cost

Calculate landscape fabric for garden beds. Get roll counts, pin quantities, seam overlap, and cost estimates for rectangle, circle, and L-shaped bed layouts.

Related Resources

How Much Concrete Do I Need? Concrete Calculator for Slabs & Footings

Read our guide

Garden Watering Calculator: How Much Water Does Your Garden Really Need?

Read our guide

How to Build a Raised Bed Garden: Complete Soil & Materials Calculator Guide

Read our guide

Raised Bed Calculator

Calculate soil and materials for raised garden beds

Compost Calculator

Get the right C:N ratio for your compost pile

Lawn Seed Calculator

Calculate grass seed for your lawn

Soil Amendment Calculator

Plan soil amendments for better growing conditions

More Garden Calculators

Explore our full collection of garden and outdoor planning tools

View All Garden Calculators

Last Updated: Mar 9, 2026

This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.

UseCalcPro
FinanceHealthMath

© 2026 UseCalcPro