Dirt Calculator
Calculate fill dirt or topsoil needed for landscaping
Enter Dimensions
How to Use This Calculator
- Measure the length of your area in feet
- Measure the width of your area in feet
- Determine the depth needed in inches
- Select the type of dirt for your project
- Click Calculate to get the amount needed
Formula
Dirt volume calculation:
Tips for Accurate Measurements
- Order 10-15% extra to account for settling
- Compact fill dirt in layers for stability
- Remove grass and vegetation before adding dirt
- Topsoil should be at least 4-6 inches deep for lawns
- Test soil pH before planting
Frequently Asked Questions
What is the difference between topsoil and fill dirt?
Topsoil is nutrient-rich surface soil for planting. Fill dirt is subsoil used for raising grade, filling holes, or building foundations. Topsoil costs more but is necessary for growing plants.
How much does dirt weigh?
Dirt weighs approximately 2,000 lbs per cubic yard when dry. Wet dirt can weigh 2,500+ lbs per cubic yard. Weight varies by composition and moisture content.
How much dirt do I need for raised beds?
For a 4x8 foot raised bed that is 12 inches deep, you need about 1.2 cubic yards of topsoil or garden soil mix.
Should I compact fill dirt?
Yes, compact fill dirt in 6-inch layers using a plate compactor or roller. Proper compaction prevents settling and ensures a stable base.
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Last updated: January 2025