Topsoil Calculator
Calculate topsoil calculator by area and depth. Precise material estimations for building contractors and DIY home builders across USA/Canada.
Calculate Topsoil Calculator
Enter project dimensions below to compute required material quantities.
Calculation Results
Calculated using verified construction formula: Cubic Yards = (Length * Width * (Depth / 12)) / 27 * (1 + Waste Margin Pct)
Quick Summary
The Topsoil Calculator computes required garden soil volume in cubic yards, cubic feet, 40lb bags, soil weight in tons, and bulk material cost for raised garden beds, lawn top-dressing, and landscaping fill.
- Cubic Yards (yd³): Bulk soil delivery truck ordering unit.
- Bagged Soil Count: Computes 40lb / 0.75 cu ft pre-packaged bag counts for small garden projects.
- Settling Allowance: Includes 10% safety margin for initial watering settlement.
How to Use the Topsoil Calculator
- Enter Garden / Lawn Length in feet.
- Enter Garden / Lawn Width in feet.
- Enter Topsoil Depth in inches (e.g. 3 to 6 inches for new lawns).
- Adjust the Waste Margin (%) (10% standard).
- Click Calculate to view cubic yards, bag counts, weight, and bulk material cost.
Topsoil Calculator Formula & Method
This tool utilizes verified construction geometric formulas to compute material requirements:
Cubic Yards = (Cubic Feet / 27) * (1 + Waste Margin / 100)
40lb Bags = Cubic Feet / 0.75 cu ft per bag
Where:
- Length & Width: Dimensions of garden bed or lawn area.
- Depth: Layer thickness in inches.
- Cubic Yard: 27 cubic feet of soil.
Worked Example
Example: 25ft * 20ft New Lawn Area (3 Inches Soil Depth) with 10% Waste
- Surface Area: 25 ft * 20 ft = 500 sq ft
- Depth in Feet: 3 in / 12 = 0.25 ft
- Base Volume: 500 * 0.25 = 125 cu ft (4.63 cu yds)
- Volume with 10% Waste: 125 * 1.10 = 137.5 cu ft (5.09 cu yds)
Applying the formula yields:
Topsoil Needed in Cubic Yards: 5.09 Cubic Yards
Bagged 40lb Topsoil Bags Needed: 137.5 / 0.75 = 184 Bags
Estimated Bulk Cost: 5.09 cu yds * = .15
What This Calculator Includes vs. Does Not Include
What This Calculator Includes
- Garden & Lawn Soil Scoping: Measures volume and bag counts for screened topsoil, compost blends, and garden soil.
- Bagged vs Bulk Soil Comparison: Compares bulk dump truck delivery vs 40lb bags.
What This Calculator Does Not Include
- Mulch or Straw Cover: Protective mulch surface layering.
Tips & Best Practices
- Order Screened Topsoil for Lawns: Screened topsoil removes rocks, roots, and large debris larger than 1/2 inch for a smooth lawn bed.
- Blend Topsoil with 30% Organic Compost for Raised Beds: Mixing 70% topsoil with 30% organic compost provides nutrient-rich soil for vegetable gardens.
Common Mistakes to Avoid
- Underestimating Soil Settling After Rain: Fresh loose soil settles 15% to 20% after initial rain; adding 10% extra volume prevents low spots.
Frequently Asked Questions (FAQ)
How many cubic yards of topsoil do I need for a 500 sq ft garden?
A 500 sq ft garden at 3 inches deep requires 4.63 cubic yards of topsoil (5.09 cubic yards with 10% waste).
How much does a cubic yard of topsoil weigh?
One cubic yard of dry topsoil weighs approximately 2,000 to 2,400 lbs (approx 1.0 to 1.2 tons). Moist soil weighs more.
How many 40lb bags of topsoil make a cubic yard?
It takes 36 bags of 40lb topsoil (0.75 cu ft per bag) to equal 1 cubic yard.
How deep should topsoil be for a new lawn?
New lawns require 4 to 6 inches of quality topsoil over subsoil for deep grass root establishment.
How much does a cubic yard of bulk topsoil cost?
Bulk topsoil costs between and per cubic yard plus delivery fees.
How many square feet does 1 cubic yard of topsoil cover at 3 inches?
One cubic yard of topsoil covers 108 square feet at 3 inches deep (or 81 sq ft at 4 inches).
Is it cheaper to buy bagged or bulk topsoil?
Bulk topsoil is significantly cheaper for orders over 1 to 2 cubic yards (/yd³ bulk vs +/yd³ in bags).
How much topsoil fits in a pickup truck bed?
A standard 1/2-ton pickup truck can carry 1 cubic yard of topsoil before reaching payload weight limits.
Is this topsoil calculator free to use?
Yes, TibCal's Topsoil Calculator is 100% free.