// 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.wellbore-pressure-gradient Calculator
Calculates wellbore pressure gradient, hydrostatic pressure, and equivalent circulating density (ECD) from mud weight and depth. ECD during drilling includes cuttings and friction pressure — exceeding the fracture gradient causes lost circulation.
Inputs
Depth M
Vertical extent downward, or thickness of a layer. For tanks: affects pressure at the base (P = ρgh).
Fluid Density Kg M3
Mass per unit volume (kg/m³). Water: 1,000. Air: 1.225. Steel: 7,850. Affects buoyancy, flow, and structural loads.
Wellhead Pressure Kpa
Force per unit area (Pa). Atmospheric pressure at sea level: 101,325 Pa. Check whether gauge or absolute pressure is required.
Results
bottomhole pressure (kPa)
Reference formula or conversion factor shown for context.
bottomhole pressure (psi)
Reference formula or conversion factor shown for context.
mud weight (ppg)
The computed weight (gravitational force) or mass.
equivalent mud weight EMW (ppg)
The computed weight (gravitational force) or mass.
P_b = ρgh + P_wh
Reference formula or conversion factor shown for context.