// 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
⌫
health.postural-load Calculator
Calculates the compressive force on the cervical spine from head weight and forward tilt angle using the Hansraj model. At 0° (upright), the head exerts 5 kg on the neck; at 60° tilt (looking at a phone), it exerts ~27 kg — the biomechanical basis for 'text neck'.
Inputs
Neck Angle
Reference formula or conversion factor shown for context.
Trunk Angle
Reference formula or conversion factor shown for context.
Hours
Reference formula or conversion factor shown for context.
Arm Elevated
Reference formula or conversion factor shown for context.
Results
effective head weight (lbs)
The computed weight (gravitational force) or mass.
RULA neck score
A numerical rating from the scoring model in use.
RULA trunk score
A numerical rating from the scoring model in use.
RULA total
The combined total across all inputs and components.
hours in posture
The result expressed in hours. Divide by 24 to convert to days.
recommendation
Suggested action or value based on the computed results and applicable best-practice guidelines.