15mm to 28mm Conversion
Wargamers drop from 28mm to 15mm mainly for the table: the same battlefield footprint holds roughly four times the miniatures at 15mm, which is why mass-battle rulesets standardized on it. This conversion is also how terrain and building STLs get resized to serve both scales from one file instead of sculpting or modeling twice.
To convert a model dimension from 15mm (1:100) to 28mm (1:56), multiply it by 1.7857 (100 ÷ 56). The result is a larger model — every length, width, and height changes by the same factor.
Conversion Chart
| 15mm size (mm) | 28mm size (mm) |
|---|---|
| 1 mm | 1.79 mm |
| 2 mm | 3.57 mm |
| 5 mm | 8.93 mm |
| 10 mm | 17.86 mm |
| 20 mm | 35.71 mm |
| 50 mm | 89.29 mm |
| 100 mm | 178.57 mm |
Frequently Asked Questions
How do I convert 15mm to 28mm?
Multiply any 15mm model dimension by 1.7857 to get the 28mm dimension. This works because 15mm is 1:100 and 28mm is 1:56, so the factor is 100 ÷ 56 = 1.7857.
Is 28mm bigger or smaller than 15mm?
28mm models are larger: the same subject is 1.7857× bigger in every dimension in 28mm than in 15mm.
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Reverse: 28mm to 15mm · 15mm (1:100) guide · 28mm (1:56) guide · Full calculator