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[Ned_the_outer_god]

How do you calculate blasting a hole through something? For instance, shooting a hole through a planet. I always wondered how

 

[Imaginym]

How do you calculate blasting a hole through something? For instance, shooting a hole through a planet. I always wondered how

If my memory serves, VSBW has Reference for Common Feats Blogs that may provide guidelines/templates for calculation such stuff.
More general use Calculation instructions can be found on the Calculations page on VSBW.

For making a hole, determine the materials removed, the volume of them/the hole made, then apply the appropriate destruction value for the removed materials.
If it is destruction, check VSBW's Calculation Page to see if we have a Destruction Value for the material. Otherwise, you may have to search the net, seek 1 out, or do some math to work it out yourself, if you can find the needed known values.
Typically, we use destruction values in joules per cubic centimeter, so just multiply volume by the amount of joules, & voila, the destruction yield.

Unless the hole was made by moving the materials out of the hole, at which point, you might want KE, so you'd need the volume, plus material densities. Use that to get mass. Determine velocity. Multiply together for KE, divide by timeframe if timeframe isn't 1 second.

After all, there are a few differences between pulling a chunk of dirt out of the ground to throw it away to the side, & simply just blowing it up with dynamite.

Oh, & for volume, you just need to measure the object/hole; It's just how much space in 3D space something takes up, after all. So for most shapes, there are even online calculators that can do a lot of the maths work for you.
With more complex shapes, the math/geometry may get a bit more complex.