HP Graphing Calculators » HP 50g » HP 50g Equation Library

HP 50g Equation Library

The HP 50g Equation Library consists of 15 subjects corresponding to the sections in the table below and more than 100 titles. On the HP 50g, there are 315 equations in total using 396 variable:

HP 50g on Algebraic Mode: To access the Library, press [APPS] key (top 2nd row, 1st key from the left). Scroll down to the 12. Equation L... option, press [ENTER] key. Under the EQN Library Menu, select "1. EQN Library..." and press [ENTER] key. And under the EQN LIB MENU, select "EQNLIB" and press [ENTER] key. The command EQNLIB() would appear. Press [ENTER] to run.

HP 50g on RPN Mode: To access the Library, press [APPS] key (top2nd row, 1st key from the left). Scroll down to the 12. Equation L...option, press [ENTER] key. Under the EQN Library Menu, select "1. EQNLibrary..." and press [ENTER] key. And under the EQN LIB MENU, select"EQNLIB" and press [ENTER] key.

To access HP 50g Equation Lib: Enter EQNLIB() and press Enter.


The following Equation Library subjects will be displayed.

Equation Library List

Press Enter, and further list will be displayed.


Press Enter to select Elastic Buckling, and press PIC to display equation diagram.


Press NUM SLV for Elastic Bucking solve equation form.

Equation Form

Columns and Beams

  • Elastic Buckling
  • Eccentric Columns
  • Cantilever Deflection
  • Simple Deflection
  • Cantilever Slope
  • Simple Slope
  • Cantilever Moment
  • Simple Moment
  • Cantilever Shear
  • Simple Sheer


  • Coulomb’s Law
  • Capacitor Charge
  • Ohm’s Law and Power
  • DC Inductor Voltage
  • Voltage Divider
  • RC transient
  • Current Divider
  • RL transient
  • Wire Resistance
  • Resonant Frequency
  • Plate Capacitor
  • Series and Parallel R
  • Series and Parallel C
  • Series and Parallel L
  • Cylindrical Capacitor
  • Solenoid Inductance
  • Capacitance Energy
  • Toroid Inductance
  • Inductive Energy
  • Sinusoidal Voltage
  • RLC Current Delay
  • Sinusoidal Current
  • DC Capacitor Current


  • Pressure at Depth
  • Flow with Losses
  • Bernoulli Equation
  • Flow in Full Pipes

Forces and Energy

  • Linear Mechanics
  • ID Elastic Collisions
  • Angular Mechanics
  • Drag Force
  • Centripetal Force
  • Law of Gravitation
  • Hooke’s Law
  • Mass Energy Relation


  • Ideal Gas Law
  • Isentropic Flow
  • Ideal Gas State Change
  • Real Gas Law
  • Isothermal Expansion
  • Real Gas State Change
  • Polytropic Processes
  • Kinetic Theory

Heat Transfer

  • Heat Capacity
  • Conduction and Convection
  • Thermal Expansion
  • Conduction
  • Black Body Radiation
  • Convection


  • Straight Wire
  • B Field in Solenoid
  • Force Between Wires
  • Field in Toroid


  • Linear Motion
  • Circular Motion
  • Object in Free Fall
  • Terminal Velocity
  • Projectile Motion
  • Escape Velocity
  • Angular Motion


  • Law of Refraction
  • Spherical Reflection
  • Critical Angle
  • Spherical Refraction
  • Brewster’s Law
  • Thin Lens


  • Mass-Spring System
  • Torsional Pendulum
  • Simple Pendulum
  • Simple Harmonic
  • Conical Pendulum

Plane Geometry

  • Circle
  • Regular Polygon
  • Ellipse
  • Circular Ring
  • Rectangle
  • Triangle

Solid Geometry

  • Cone
  • Parallelepiped
  • Cylinder
  • Sphere

Solid State Devices

  • PN Step Junctions
  • Bipolar Transistors
  • NMOS Transistors
  • JFETs

Stress Analysis

  • Normal Stress
  • Stress on an Element
  • Shear Stress
  • Mohrs Circle


  • Transverse Waves
  • Sound Waves
  • Longitudinal Waves

Updated On: 13.09.15

  1. On 31-Aug-2016, Anonymous wrote: 
    Hmm, not so fresh post, but I think the function key SOLV is required before pressing NUM SLV - I suppose thats what was meant with ''instructions don't work''...
    Your reply to Anonymous

  2. On 07-May-2015, Anonymous wrote: 
    those instructions don't work
    Your reply to Anonymous
    • On 08-May-2015, Ron replied: 
      Which instructions, where? Please elaborate so that we have a chance to provide help.
      Your reply to Ron

  3. On 14-Mar-2013, Melvin Emery wrote: 
    Is there anyway I can get The Equation Library on the Sd card?
    Your reply to Melvin Emery
    • On 14-Mar-2013, Peter Tong replied: 
      You may want to check out the following link.
      Your reply to Peter Tong

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In reply to Melvin Emery, who on 14-Mar-2013 wrote:
Is there anyway I can get The Equation Library on the Sd card?