Formula
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Compaction multiplier and density are supplied estimates; moisture and grading affect both.
Example Calculation
- Area: 25 m²
- Finished depth: 40 mm
- Loose-volume multiplier: 1.15
- Loose bulk density: 1600 kg/m³
25 m² at 40 mm finished depth with multiplier 1.15 needs 1.15 m³ loose sand.
Frequently asked questions
How do I use this calculator?
Enter area, finished depth, loose-volume multiplier, loose bulk density. The result updates automatically. Use Reset to restore the example values.
What method does it use?
loose volume=area × depth/1000 × multiplier; mass=loose volume × density.. Compaction multiplier and density are supplied estimates; moisture and grading affect both.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.