I have an organic shell and I need to calculate the surface area (cm2)?
Since your query is not elaborated enough, you may need to check the followings to calculate your object's surface area:
https://www.How to calculate the total surface area of a spherical shell - Quora
Consider a shell with thickness tt and inner diameter dd.
Total surface area = Inner surface area + Outer surface area
Now inner surface area is πd2πd2
And outer surface area is \pi(d+t)2pi(d+t)2
Therefore total surface area is π(d+t)2+d2π(d+t)2+d2
However for a shell the thickness is considered to be zero. Therefore
Total surface area becomes 2ϕd2
https://www.Cylindrical Shell Calculator - Calculator Academy - Volume & Surface Area
It can be done with Chimera (free of charge - https://www.cgl.ucsf.edu/chimera/)
Probably the structure of the organic molecules should be optimized first to give more realistic values. Once the molecule is optimized with the method of your choice (probably it would depend on how big the system is ) you can open it with chimera. Chimera accepts many different formats.
When you open the molecule you should first generate the surface: Action/Surface/show
Then you can measure the volume and area: Tools/Volume Data/Measure Volume and Area.
Hope you will find it useful.
What is the organic shell? Do molecules locate together? You can use volume keyword in some software of quantum chemistry to proceed it.
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