Example engineering calculations
Worked, unit-aware calculation worksheets across structural, mechanical, electrical and more. Open any example into your own workspace to edit and reuse.
315 examples
Stirred-Tank Reynolds Number
Impeller Reynolds number characterising mixing in a stirred tank.
Arrhenius Rate Constant
Reaction rate constant from the Arrhenius equation.
Solution pH
pH of a solution from its hydrogen-ion concentration.
Heat of Reaction
Total heat released or absorbed by a reaction from its molar enthalpy.
Partial Pressure (Dalton’s Law)
Partial pressure of a gas component from its mole fraction and total pressure.
Osmotic Pressure
Osmotic pressure of a dilute solution from its molar concentration.
Mass from Moles
Mass of a substance from its amount and molar mass.
Coulomb’s Law Force
Electrostatic force between two point charges.
Parallel-Plate Capacitance
Capacitance of a parallel-plate capacitor from its geometry.
RMS Voltage of a Sine Wave
Root-mean-square voltage of a sinusoid from its peak value.
Power Factor
Power factor of an AC load from its real and apparent power.
Energy Stored in an Inductor
Magnetic energy stored in an inductor carrying a current.
Battery Run Time
Run time of a battery from its capacity and the load current.
Three-Phase Line Current
Line current of a balanced three-phase load from its power, voltage and power factor.
Electrical Energy Consumption
Energy used by a load running at a given power for a period.
Newton’s Second Law (Acceleration)
Acceleration of a body from the net force and its mass.
Weight from Mass
Weight (gravitational force) of a mass under gravity.
Friction Force
Maximum dry friction force from the normal force and friction coefficient.
Angular Velocity from Rotational Speed
Angular velocity in radians per second from the rotational speed.
Wavelength from Frequency
Wavelength of a wave from its speed and frequency.
Heat Engine Net Work
Net work output of a heat engine from the heat taken in and rejected.
Snell’s Law Refraction
Refraction angle of light passing between two media.
Thin Lens Image Distance
Image distance of a thin lens from its focal length and object distance.
Energy Conversion Efficiency
Efficiency of a device as useful output over energy input.