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3D file formats

Binary STL size calculator

Calculate exact standard binary STL size from its triangle count.

Your inputs

Start with an example

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Your result

Example result

How it works

Standard binary STL uses an 80-byte header, a 4-byte triangle count and 50 bytes per triangle.

1,000 triangles require 84 + 50,000 = 50,084 bytes.

Limits

Does not estimate ASCII STL, compressed files or nonstandard extensions. Triangle count says nothing about model dimensions or printability.

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