Fill Dirt Calculator
Rough fill for low spots and utility trenches. Uses a typical compacted fill density for weight guidance.
Step 1: Units
Step 2
Enter project measurements
Use decimals if needed (e.g. 3.5).
Step 3
How to use this calculator
Measure the coverage rectangle and average depth you want after compaction. Deeper sections can be averaged or split into multiple runs.
What the math is doing
Volume is length × width × depth. Weight multiplies volume by a typical bulk density for that material.
How to measure
Stake the area and run a string line for straight edges. Depth is from existing grade to finished grade.
Frequently asked questions
Clean fill vs structural?
This is geometric volume only; engineered fills need testing.
Compaction lifts?
Depth is finished compacted height you want to achieve.
Clay vs sand fill?
Density varies; treat weight as approximate.
Swelling clay?
Ask your engineer about shrink-swell factors beyond this tool.