1:100 Scale to 1:200 Scale Conversion
These are the two workhorse presentation scales of metric architecture: 1:100 for a single building where floor layouts still read, 1:200 for the site plan and massing model where the whole plot has to fit the baseboard. Nearly every studio project moves between them at least once — halving or doubling every dimension — and this page is the sanity check that laser-cut walls or 3D-printed massing blocks actually land at the size the drawing implies.
To convert a model dimension from 1:100 Scale to 1:200 Scale, multiply it by 0.5 (100 ÷ 200). The result is a smaller model — every length, width, and height changes by the same factor.
Conversion Chart
| 1:100 Scale size (mm) | 1:200 Scale size (mm) |
|---|---|
| 1 mm | 0.50 mm |
| 2 mm | 1.00 mm |
| 5 mm | 2.50 mm |
| 10 mm | 5.00 mm |
| 20 mm | 10.00 mm |
| 50 mm | 25.00 mm |
| 100 mm | 50.00 mm |
Frequently Asked Questions
How do I convert 1:100 Scale to 1:200 Scale?
Multiply any 1:100 Scale model dimension by 0.5 to get the 1:200 Scale dimension. This works because 1:100 Scale is 1:100 and 1:200 Scale is 1:200, so the factor is 100 ÷ 200 = 0.5.
Is 1:200 Scale bigger or smaller than 1:100 Scale?
1:200 Scale models are smaller: the same subject is only 0.5× the size in each dimension compared to 1:100 Scale.
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