Slic3r - Slice to SVG - Calculating # of Layers

Greatings all....

I'm trying to figure out the formula that Slic3r uses to calculate number of layers when saving to a SVG file.

Example:
3D module Z height = 12.7 mm
At 256 layers, Layer height should be equal to 0.049609375mm

I open the SVG created and I get 247 layers instead of the 256 layers expected using the 0.049609375mm layer height that was calculated to return 256 layers. I've tried different model layer heights and I'm not getting the right amout of layers by calculating the Layer height needed to achieve the number of layers expected.

The layer height number i'm inputing is in the "Printer Settings" tab.

Any help would be appreciated.

Thanks,
Tony

Edited 1 time(s). Last edit at 06/27/2015 01:13AM by tonytt98.

I figured it out. I didn't change the "First Layer Height:" to be the same as the "Layer Height:". Calculates perfect now..