Compacted volume
Calculate the final volume using length, width, depth, area or thickness.
Fill and Compaction Calculator
Calculate how many cubic meters of fill material you need for a site, platform or trench. Estimate compacted volume, loose material, approximate weight and required truck loads.
Loose material
Apply an additional factor to estimate the material required before compaction.
Weight and hauling
Estimate material weight and truck loads using the selected truck capacity.
Free online tool
Fill Material Calculator
Calculate how many cubic meters of fill material are required to achieve a target compacted volume and estimate weight and truck loads.
Fill dimensions
Material and hauling
The factor and density are completed automatically according to the material, but they can be changed.
Results are approximate. Actual volume may vary according to particle size, moisture, initial density, placement method, layer thickness, compaction equipment and project specifications.
How to calculate how much fill material you need
First determine the final volume that the fill must occupy after compaction. For a rectangular shape, multiply length, width and depth.
When the surface area is already known, multiply the area by the required thickness. The calculator automatically converts the thickness entered in centimeters to meters.
An additional percentage is then applied to estimate the reduction in volume that may occur during placement and compaction.
Compacted volume
Volume = length × width × depth
Estimated loose material
Loose material = compacted volume × (1 + additional factor)
Example: calculate cubic meters of fill material
Fill inputs
Length12 m
Width5 m
Depth0.50 m
Additional factor20%
Additional allowance5%
Truck capacity10 m³
Approximate result
The compacted volume is:
12 × 5 × 0.50 = 30 m³
After applying a 20% additional factor, approximately 36 m³ of loose material would be required.
With an additional 5% allowance, the recommended total would be approximately 37.8 m³.
Using trucks with a usable capacity of 10 m³, approximately 4 truck loads would be required.
Factors that change the required quantity
Actual quantity may vary according to moisture, particle size, initial density, material source and hauling conditions.
Layer thickness, compaction equipment, number of passes and required final density also affect the quantity needed.
Uneven ground, contamination, losses and difficult access may increase material consumption.
Preliminary estimate
This tool does not guarantee final density, bearing capacity or fill stability.
Structural fills, platforms, pavements and foundation areas may require material specifications, laboratory testing, moisture control and field compaction tests.
Fill and compaction work in Panama
In Panama, rainfall, moisture content, drainage, access and material availability can affect fill and compaction productivity.
Platforms, structural fills, subdivisions, pavements and site preparation projects should be reviewed according to the actual material and project specifications.
Visit MG Architecture & EngineeringFill and compaction questions
What is the difference between loose and compacted volume?
Loose volume is the material volume before compaction. Compacted volume is the final space occupied after the material has been placed, spread and compacted.
Why is more material required than the final fill volume?
Material loses air voids and decreases in volume during placement and compaction. An initial loose volume greater than the target compacted volume is therefore generally required.
What additional compaction factor should I use?
It depends on material type, moisture, particle size, initial density, layer thickness, equipment and required final density. The automatic values are preliminary references and should be technically verified.
How are estimated truck loads calculated?
The recommended total loose material volume is divided by the usable truck capacity. The result is rounded up because a partial final load still requires an additional trip.
Can the full nominal truck volume always be used?
Not necessarily. Actual capacity may be restricted by weight limits, material density, moisture, road regulations, site access and vehicle safety requirements.
Can the calculator be used for trench backfill?
Yes. Select trench backfill and enter length, width and depth. If pipes or other elements occupy part of the trench, their volume should be deducted separately.
How do I calculate how many cubic meters of fill I need?
Multiply length × width × depth to calculate the compacted volume in cubic meters. Then apply the additional compaction factor and, when appropriate, an extra allowance to estimate the total loose fill material required.
How much soil do I need to raise a site or yard?
Multiply the surface area by the required fill thickness. For example, 100 m² with 0.20 m of fill equals 20 m³ of compacted volume before adding compaction and waste allowances.
Does the calculator guarantee the final compacted density?
No. Final density depends on material properties, moisture, placement method, equipment, number of passes and field controls. Testing may be required when specified by the project.