Basic Calculations

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HintLightbulb.png Hint: WIP.

  1. Use Calculations Template - you can make a copy of it or include just the relevant quantities.
  2. Document your work at a wiki page named MachineName_Calculations
  3. Use Presentation Template to explain your calculations with pictures and diagrams. Embed this on the MachineName_Calculations wiki pag. For simple calculations, take pictures of backs of envelopes, your note sheets, screencasts, etc - that show basic quantifications. Use whatever is relevant to quantify what you are working on.


Calulations are importance for reasons of determining performance. They are also used in product literature to show useful product specifications.

Scaling Calculations are calculations that also consider scalability. These calculations include all relevant physical, mechanical, fluid, electrical, chemical, thermal, static, dynamic, aerodynamic, acoustic, optical, hydrological, nuclear, structural, and other properties that allow a machine to be effective for a particular purpose. Scalability is emphasized because a single design should be adaptable to different scales of operation via Intensive and Extensive Scalability. Calculations include both parameters and calculations based on these parameters.

Natural Resource Availability


Electrical and Magnetic




  • Fractional inch to mm - [4]


Speed, Torque, Power, Energy, Pressure

  1. Torque and RPM to Power Calculator
  2. Cycling Power and Speed Calculator
  3. Torque Conversion Calculator
  4. Pile Driver Calculations
  5. Hammermill rotor load - Soil_Mixer_2019#Calculating_Load_of_on_Motor
  6. Motor Speed Calculator
  7. Hydraulics Calculators
  8. Chain Length Calculator
  9. Embodied energy - Cement Energy Calculations

Pipe and Flow

  1. Plastic Pipe Pressure Drop Calculator

Physical Quantities

  1. Motor Torque based on power
  2. Nichrome Wire Calculator
  3. Pulley Calculator
  4. Solenoid Force Calculator
  5. Solar Angle Calculator
  6. Magnet Force Calculator
  7. Cycling Power and Speed Calculator

Air Flow

  1. Air Exchange Per Hour Calculator

Machine elements

  1. Bearing calculation
  2. Gear calculation
  3. Coupling Selection
  4. Motor selection


  1. Cost of Living


  1. FreeCAD FEM Workbench
  2. Shaft Deflection Calculator
  3. Beam Deflection Calculator
  4. Fibers - Fiber-Plastic Composite Calculations

Size, Geometry, Weight and Volume

  1. Area Calculator
  2. Volume Calculator
  3. Steel Plate Weight Calculator
  4. Bolt Weight Calculator
  5. Nut Weight Calculator
  6. Metals Weight Calculator - by material
  7. Steel Weight Calculator - steel by shape
  8. Triangle Calculator
  9. Basic force, torque, stress limit calculations
  10. Center of Mass + Weight
  11. Range of Motion Design calculations
  12. CAE analysis for structural failure, fatigue, deformation, crash testing, abrasion, thermal properties, and others
  13. Cost
  14. Beam deflection
  15. Expected lifetime
  16. Basics Statics calculations according to Basic Statics Calculations Procedure
  17. Expected maintenance cost according to Maintenance Cost Template
  18. Performance/power/speed/lifetime/lift/etc.
  19. Precision calculations - what precision of motion is achieved in devices
  20. Tolerancing requirements
  21. Hydraulic fluid flow and pressure
  22. Basic static loads analysis of mechanical devices
  23. Rotation speeds
  24. Bending forces
  25. Shear strength limits
  26. Thermal loss calculations
  27. Thermal profiles - FEA
  28. Geometrical optics
  29. Torque calculations
  30. Rotational inertia
  31. EMF calculations
  32. Thermal mass calculations
  33. Combustion calculations


These calculations should be performed for all critical components of machines, even though the aim is not Value Engineering. In the case over-building of components for purposes of lifetime design, calculations are relevant for providing accurate assessment of safety factors and performance expectations independent of empirical performance data.

A list of desired calculations or data points should be produced for each machine. Note: a spreadsheet or education page should be included to give a crash course on each calculation for the benefit of a novice who has a working knowledge of secondary-level

OSE Machines


The typical calculations for consideration are: