Calculating Young Modulus to GPa

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To calculate Young's modulus in GPa, first convert the energy from electronvolts (eV) to joules (J), as eV is a non-SI unit. The volume in angstroms cubed (ų) must also be converted to cubic meters (m³) to align with SI units. After these conversions, Young's modulus can be expressed in pascals (Pa), which can then be converted to gigapascals (GPa) by dividing by 1 billion. Ensuring all units are consistent is crucial for accurate calculations. Proper unit conversion is essential for obtaining the desired result in GPa.
saray1360
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Hi,

I have calculated the young modulus of a system by calculating the second derivate of the energy against the axial strain and then I devided the result on the volum.

The unit of the energy is eV and the volume is in angstrom^3. I want to calculate the young modulus in GPa, should I consider a coefficient? how could I get to GPa out of [eV/(angS^3)] ?

Regards,
 
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convert to SI

Hi saray1360! :smile:

Pa is an SI unit, so you need to convert everything else to SI units first.

angstrom is easy :biggrin: … but eV is totally non-SI, so you'll need to find the factor to convert it to joules. :wink:
 

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