Topsoil Calculator

Name: Topsoil Calculator
Author: Jitendra Kumar

Estimate topsoil for lawns, garden beds, tree rings, low spots, and raised-bed fill by area, depth, bag size, density, allowance, and price.

Last Updated: June 13, 2026

Area shape

Length unit

Extra allowance

Use 10% to 15% for settling, compaction, and uneven grade.

Length

Width

Topsoil depth

Depth unit

Bag size

cu-ft

Bag unit

Soil density

lb/cu ft

Use the supplier value when available. Moist topsoil varies widely.

Price per bag

Optional bagged-soil cost estimate.

Price per cubic yard

Optional bulk delivery material cost estimate.

Cubic yards to order

2.716cu yd

Cubic feet

73.33cu ft

Bags to buy

Estimated weight

2.75tons

Bulk material cost

$95.06

Bagged material cost

$390.04

Area covered

200 sq ft

Base volume

66.67 cu ft

Extra allowance

6.67 cu ft

Metric volume

2.077 m3

Formula

Area x depth = base volume. The calculator adds your allowance, converts cubic feet to cubic yards, and estimates bag count from the selected bag volume.

Ordering note

Exact bag count is 97.78. Bulk orders are usually quoted in cubic yards, while delivery weight depends heavily on moisture and soil mix.

Topsoil Planning Notice

This calculator provides practical material estimates only. Actual topsoil needs can change with slope, compaction, moisture, screening, soil mix, settling, existing grade, and delivery method. Confirm large orders with your supplier or landscape professional.

Checked by Jitendra Kumar

Topsoil Calculator is checked for formula labels, source links, and result limits.

Jitendra Kumar, Founder & Editorial Standards Lead. Updated June 13, 2026. Scope: measurement calculators.

Sources & methodology · Review standards

How to Use the Topsoil Calculator

Choose the shape that best matches the project area. Use rectangle for straight lawn or bed sections, circle for round patches, and known area when you already have square footage from a plan or area calculator.

Enter the topsoil depth and extra allowance, then add bag size, density, and pricing if you want bag count, weight, and cost estimates. Use the cubic yards result for bulk delivery and the bag count for retail purchases.

Step 1: Measure the area
Enter length and width, diameter, or known square footage. Split irregular yards into smaller sections before adding them together.
Step 2: Choose a soil depth
Use a shallow depth for topdressing and a deeper depth for new beds, grade correction, or raised-bed fill.
Step 3: Set allowance and density
Add extra for settling and use the supplier density when available. Moist topsoil can weigh much more than dry soil.
Step 4: Compare bulk and bagged options
Use cubic yards and tons for delivery planning, or whole bags and bag cost for small retail projects.

How This Topsoil Calculator Works

The calculator converts the selected dimensions to square feet, converts topsoil depth to feet, and multiplies area by depth. That gives base topsoil volume in cubic feet.

It then adds the extra allowance percentage and converts the final volume into cubic yards, cubic meters, liters, retail bags, pounds, and short tons. Bag quantity is rounded up because bagged soil is usually purchased in whole bags.

The weight estimate uses your entered density in pounds per cubic foot. Topsoil density is not fixed; USDA NRCS bulk-density guidance explains that soil density changes with texture, organic matter, structure, compaction, and moisture.

Topsoil Planning Guide

Topsoil Depth Reference

Depth	Typical use	Planning note
0.25 to 0.5 inch	Light lawn topdressing	Use for minor smoothing or compost/topsoil blends over existing turf.
2 to 3 inches	Thin garden refresh or low spot fill	Good for modest grade correction when existing soil remains the base.
4 to 6 inches	New lawn or garden bed base	Common planning depth when building a more meaningful planting layer.
8 to 12 inches	Raised bed or deep fill	Often better priced as bulk delivery than bagged topsoil.

Topsoil Conversion Reference

Measure	Conversion	Best use
1 cubic yard	27 cubic feet	Standard bulk topsoil ordering unit in the U.S.
1 cubic foot	About 0.037 cubic yards	Common bag-size unit for retail topsoil.
1 cubic meter	About 35.315 cubic feet	Useful when working from metric plans.
40 lb bag	Often around 0.75 cubic feet, varies by product	Check the bag label; weight alone does not fix volume because moisture varies.

Worked Topsoil Examples

Project	Calculation	Planning result
200 sq ft lawn top-up at 2 in	200 x 0.167 = 33.4 cu ft	About 1.24 cu yd before settling allowance.
4 ft x 8 ft raised bed, 10 in fill	32 x 0.833 = 26.66 cu ft	About 0.99 cu yd; check whether the mix is topsoil-only.
3 cu yd at 80 lb/cu ft density	3 x 27 x 80 = 6,480 lb	About 3.24 short tons for hauling checks.

Bulk topsoil is usually the practical choice once a project reaches several cubic yards. Bagged topsoil is easier for small beds, patch repairs, and projects where delivery is inconvenient. The calculator shows both views so you can compare convenience against material cost.

For irregular areas, calculate the area first with the room and plot area calculator, then return here to convert square footage and depth into topsoil volume.

Keep the research moving with Mulch Calculator, Room / Plot / Lot Area & Size Calculator, Area Converter, and Volume Converter.

Frequently Asked Questions

Multiply the area by the desired topsoil depth, using feet for both. For example, 200 square feet at 4 inches deep is 200 x 0.333 feet, or about 66.7 cubic feet before any extra allowance. Divide cubic feet by 27 to get cubic yards.

One cubic yard equals 27 cubic feet. Bulk topsoil is commonly ordered by the cubic yard, while bagged topsoil is commonly labeled in cubic feet, quarts, liters, or pounds.

Light lawn topdressing may use less than 1 inch. New lawns and garden beds often use several inches. Raised beds may need much deeper fill. The right depth depends on the project, existing soil, drainage, and plant needs.

Topsoil weight changes with texture, organic matter, compaction, and moisture. Density lets the calculator estimate delivery weight in pounds and short tons, but supplier numbers are better than a generic default.

A 10% to 15% allowance is common for settling, compaction, grade variation, and measurement gaps. Large irregular areas or deep fills may need more careful site measurement.

It multiplies area by desired soil depth after converting depth to feet. Cubic feet divided by 27 gives cubic yards, and volume multiplied by density gives estimated weight.

One cubic yard equals 27 cubic feet. If a bag contains 0.75 cubic feet, one cubic yard takes 36 bags before allowance.

No. A cubic yard is volume and a ton is weight. Moisture, texture, organic matter, and compaction determine how many tons one cubic yard weighs.

Measure each low area separately and use the average fill depth, not just the deepest point. Add the volumes and include extra for settling.

Yes, if you enter the bed footprint and fill depth. For deep raised beds, check whether you are using topsoil alone or a raised-bed mix with compost and drainage material.

Bag weight changes with moisture. Use the bag volume printed on the label for volume planning, then use supplier weight only for hauling or delivery limits.