Topsoil Calculator – Volume, Weight, Bags & Loads
Enter your area, choose a depth, and add a waste factor to account for settling and uneven surfaces. The calculator shows volume in metric and imperial, estimated weight, bag counts, and convenient wheelbarrow/truckload equivalents.
When planning a landscaping or gardening project, it’s always better to slightly overestimate your topsoil needs rather than fall short. Settling, rain, and compaction can reduce the final height of the soil after it’s spread, especially in raised beds and lawns. Ordering a little extra ensures you have enough to create a smooth, even finish and avoids the hassle of making multiple deliveries. Use our Topsoil Calculator to compare bulk delivery against bagged soil options so you can choose the most cost-effective method for your project.
Recommended Depths
- New lawns: 2–3 in (50–75 mm)
- Flower beds: 6–8 in (150–200 mm)
- Vegetable beds: 8–12 in (200–300 mm)
- Raised beds: 12 in+ (300 mm+)
Topsoil vs Garden Mix vs Compost
Topsoil is the mineral soil layer used for leveling and base fertility. Garden mix blends topsoil with organic matter for beds, while compost is a soil amendment—mix in rather than use alone for depth.
Related Tools
You may also find these helpful: Sand Calculator and Gravel Calculator.
FAQs
How much topsoil do I need per square foot?
About 0.083 yd³ per 100 ft² per inch of depth (or ~0.076 m³ per 10 m² per 10 mm).
How much does 1 cubic yard of topsoil weigh?
Typically 1,000–1,600 kg/m³. A cubic yard (0.765 m³) often weighs ~1,000–1,400 kg depending on moisture and blend.
How many bags equal 1 cubic yard?
With 20 kg bags at 1200 kg/m³ density, ~46–60 bags per cubic yard (varies by moisture/density). Our calculator estimates it for you.
Important Estimate Disclaimer
The results provided by this calculator are intended as general estimates only and should not be considered precise engineering measurements. Actual material requirements, costs, and quantities can vary significantly based on site conditions, local building codes, soil type, reinforcement requirements, climate exposure, and the intended use of your project.
These calculators are designed to help you plan and budget your project more effectively, but they do not replace professional advice from a qualified contractor, engineer, or building inspector. Always verify your calculations and assumptions with trained professionals before placing material orders or commencing construction.
For more information on the assumptions, formulas, and data used in these tools, see our Data Sources and Methodology pages.
Material estimates, cost figures, and volume calculations are approximate and may not reflect your actual requirements. Always double-check dimensions and project-specific needs, and consider adding a contingency allowance for waste, over-excavation, and unforeseen conditions.
If you are unsure about any aspect of your project — including structural requirements, reinforcement needs, drainage, or load-bearing capacity — consult with a licensed professional before proceeding.