// multi-utility computation suite · offline · instant · precise
┌──────────────────────────┐
│ [c] calcalyst_ │
│ computation suite │
└──────────────────────────┘
// select a module to initialize
/ search↵ open firstesc close
// adsenseEMPTY_LEADER_SLOT728×90
// adsenseMOBILE_ANCHOR_SLOT320×50
// keyboard_shortcuts
/focus search
↑↓navigate module list
Enter
open first result from search
open highlighted
compute when module is open
compute when focused in a field
Escclose module · clear selection
⌫
eng.cone-penetration-test-soil Calculator
Interprets Cone Penetration Test (CPT) data to classify soil type, estimate relative density, and calculate bearing capacity. CPT sleeve friction ratio (fs/qc) distinguishes sand (low fr) from clay (high fr) — the Robertson soil behavior type chart provides a systematic classification.
Inputs
Qc Mpa
Opposition to current flow (Ω). V = IR. Resistors in series add; in parallel their reciprocals add.
Fs Kpa
Reference formula or conversion factor shown for context.
Sigma V Kpa
Internal force per unit area (Pa or MPa). Must stay below yield strength in service.
Sigma V Eff Kpa
Internal force per unit area (Pa or MPa). Must stay below yield strength in service.
Results
friction ratio Fr (%)
The proportional relationship between two quantities.
normalized cone resistance Qt
Opposition to current flow (Ω). Ohm's Law: V = IR. Lower resistance means more current for the same voltage.
soil behavior type index Ic
A normalised score comparing the result to a reference baseline.
soil classification
Category assigned based on where the computed value falls on a defined scale. Check which standard or guideline defines these boundaries.
Robertson (1990) SBT chart
Sample size or count used in the calculation.
Ic > 2.6
Reference formula or conversion factor shown for context.