Penetration Calculator

Use the calculator on this page to estimate penetration for armour piercing projectiles. Read a bit more about the equations and see an example here.
Estimate:
Caliber mm
Mass kg
Velocity m/s
Penetration mm
Reference (DeMarre only):
Caliber mm
Mass kg
Velocity m/s
Penetration mm

16 comments:

  1. I'm not sure what it is but there is some problem with the right side (DeMarre) Penetration result. You have to enter a value there and then one pops into the left side (Krupp) Penetration. This is confusing.

    -m

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    Replies
    1. That's intentional, but I can see how that would be confusing. I'll get around to changing it.

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  2. At what range and angle the penetration value is given?

    Is it point blank, i.e. 0 meters @ 90 degree?

    Thanks.

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    Replies
    1. Depends on what range the shell achieves that velocity at. Penetration for Krupp is 90 degrees, penetration for DeMarre is at whatever your reference angle is.

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  3. This comment has been removed by the author.

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  4. This comment has been removed by the author.

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  5. Your calculator isn't working properly. When you try to get the results for the DeMarre calculation it gives you a result of "NaN"

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    Replies
    1. It's working for me. Make sure to fill out all the fields in the Reference section and all fields in the Estimate section except Penetration. If it still doesn't work, post your browser and console output.

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  6. The DeMarre calculator doesn't work.
    Filled out the conditions for Calibre, Mass and Velocity but when clicking the Calculate (DeMarre) button it just gives a NaN message in the Top penetration calculator.

    ReplyDelete
    Replies
    1. You need to enter reference values in the lower set of boxes if you want the DeMarre calculation.

      Delete
  7. Can you post the DeMarre equation. I can't find it anywhere

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  8. I might not be entering the values correctly, but I am finding it very difficult to get 150mm of penetration with a 77mm shell like the 17 pounder was historically capable off.

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    Replies
    1. The Krupp method does give values that are too low, but I plugged in British data for the 6-pounder (2.7 kg shell, 900 m/s muzzle velocity, 101 mm of penetration) and got 152 mm of penetration for the 17-pdr.

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