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Home & Construction Calculators

Soil Calculator

Estimate fill dirt or soil volume, bag count, and weight from area dimensions or total square footage.

Read the complete step-by-step guide
Live calculator

Estimate topsoil, fill dirt, or garden soil in cubic yards, bags, and tons from area, depth, and material density.

Garden / bed size

For refreshing gardens, 3–6 inches of new soil is usually enough. Raised beds: measure the full depth of the box.

Soil needed

Cubic yards1.235 cu yds
Cubic feet33.33 cu ft
Cubic meters0.944 m³

Bags of soil needed

0.75 cu ft bags45 bags

Bag estimate uses 0.75 cubic feet per bag (common 40 lb bag size).

Material weight

Dry, loose or packed1.42 tons
Compacted1.975 tons
Wet2.099 tons

Dry/loose soil is about 1.0–1.3 tons per yard; wet or compacted soil is about 1.5–1.7 tons per yard.

Formula

The Soil Calculator applies standard soil formulas used in construction and home improvement planning. Inputs such as length, width, height, area, coverage rate, and waste allowance are combined to estimate material quantities. Always confirm product specifications and site conditions before ordering.

How it works

Enter your project measurements and any options such as openings, waste percentage, unit system, or material size. The Soil Calculator calculates the soil total from those inputs. Review units carefully and adjust waste or coverage assumptions to match your supplier's product data.

Examples

Example: For a 12 ft × 14 ft room with a 9 ft ceiling, wall surface area is 468 sq ft before subtracting doors and windows. Use those dimensions in the Soil Calculator to estimate soil quantities, then add a waste allowance if the tool supports it.

About this calculator

Estimate fill dirt or soil volume, bag count, and weight from area dimensions or total square footage.

Project-ready estimates

Turn room measurements and material specs into practical soil totals before you buy or start work.

Standard formulas

Calculations follow common trade and DIY formulas so your estimate aligns with how pros plan similar jobs.

Plan with confidence

Compare scenarios by adjusting dimensions, waste factors, or coverage inputs to see how requirements change.

Best for
  • Material takeoffs
  • Budget planning
  • DIY weekend projects
  • Contractor estimates

Frequently asked questions

Quick answers about this calculator—how it works, accuracy, and everyday use.

The Soil Calculator provides a solid planning estimate based on standard formulas and typical material assumptions. Actual jobsite needs can vary with waste, cuts, product specs, and installation method—always confirm with your supplier.

Gather the key dimensions for your project—length, width, height, area, or coverage inputs shown in the calculator. Accurate measurements upfront help you order the right amount of soil and reduce costly shortages or overages.

Most construction and home projects benefit from a waste allowance for cuts, breakage, and mistakes. Many pros add roughly 5–15% depending on the material and layout complexity.

Yes. The Soil Calculator on Online Calculator Spot is free, works in your browser, and does not require an account. Results update instantly as you enter values.

Yes. The Soil Calculator is mobile-friendly, so you can estimate, convert, or calculate from any device with a modern web browser.