Compaction Calculator
Plan layers and check % compaction. Choose unit system.
Units
Metric (SI)
US (Imperial)
Layer Plan
Compaction Check
Granular + Vib. Roller
Cohesive + Sheepsfoot
Hand / Plate Compactor
Total fill height
Full height to be compacted
Max layer (lift) thickness
Per pass limits (soil/equipment)
Suggested passes (optional)
Set by preset or your own value
Min layers (optional)
Force more layers if needed
Number of layers
Std. layer thickness
Last layer thickness
Layers = ceil(H / lift). Std. thickness = H / layers.
Max dry density (MDD)
From Proctor test
% compaction target
Common: 95% or 98%
Field input
Field wet density + moisture
Field dry density
Field wet density
From sand cone / nuke gauge
Moisture content (%)
As percent
Field dry density
If you measured dry density
OMC (opt. moisture, %)
From Proctor test
Moisture tolerance (±%)
Range around OMC
% Compaction
Field dry density
Field moisture
Dry density = Wet / (1 + w). %Comp = (Field dry / MDD) × 100.