Enter one real-world measurement and see how it looks in every common modelling scale at once — perfect for comparing N, TT, HO, OO, O and more.
Scale Model Figures - Scale Reference Card
Real-world objects in every common scale, plus STL resize percentages between popular scale pairs.
Real-world sizes across scales (mm)
| Scale | 6 ft person | 1.75 m person | Standard car (4.5 m) | Tank (6.3 m) |
|---|---|---|---|---|
| N Scale 1:148 | 12.36 | 11.82 | 30.41 | 42.57 |
| TT Scale 1:120 | 15.24 | 14.58 | 37.50 | 52.50 |
| HO Scale 1:87 | 21.02 | 20.11 | 51.72 | 72.41 |
| OO Scale 1:76 | 24.06 | 23.03 | 59.21 | 82.89 |
| 1:72 1:72 | 25.40 | 24.31 | 62.50 | 87.50 |
| 1:64 1:64 | 28.58 | 27.34 | 70.31 | 98.44 |
| 1:56 1:56 | 32.66 | 31.25 | 80.36 | 112.50 |
| 1:50 1:50 | 36.58 | 35.00 | 90.00 | 126.00 |
| 1:48 1:48 | 38.10 | 36.46 | 93.75 | 131.25 |
| O Scale 1:43 | 42.53 | 40.70 | 104.65 | 146.51 |
| 1:35 1:35 | 52.25 | 50.00 | 128.57 | 180.00 |
| 1:32 1:32 | 57.15 | 54.69 | 140.63 | 196.88 |
| 1:24 1:24 | 76.20 | 72.92 | 187.50 | 262.50 |
| 1:22 1:22 | 83.13 | 79.55 | 204.55 | 286.36 |
| 1:20 1:20 | 91.44 | 87.50 | 225.00 | 315.00 |
| 1:18 1:18 | 101.60 | 97.22 | 250.00 | 350.00 |
| 1:16 1:16 | 114.30 | 109.38 | 281.25 | 393.75 |
| 1:12 1:12 | 152.40 | 145.83 | 375.00 | 525.00 |
| 1:10 1:10 | 182.88 | 175.00 | 450.00 | 630.00 |
STL resize percentages
| Resize a model from | To | Resize to |
|---|---|---|
| 1:12 (1:12) | 1:24 (1:24) | 50.00% |
| 1:24 (1:24) | 1:35 (1:35) | 68.57% |
| 1:35 (1:35) | 1:48 (1:48) | 72.92% |
| 1:48 (1:48) | 1:64 (1:64) | 75.00% |
| 1:64 (1:64) | 1:72 (1:72) | 88.89% |
| 1:72 (1:72) | OO Scale (1:76) | 94.74% |
| OO Scale (1:76) | HO Scale (1:87) | 87.36% |
| HO Scale (1:87) | TT Scale (1:120) | 72.50% |
| TT Scale (1:120) | N Scale (1:148) | 81.08% |
| N Scale (1:148) | 1:160 | 92.50% |
Resize percentage = current scale ÷ target scale. Example: printing a 1:35 model at 1:48, resize to 72.92%. Tank reference: Tiger I length (6.3 m).
A note on figure heights: model figure height may be measured to the top of the head or to eye level, depending on the manufacturer. Always check the manufacturer's stated measurement convention before comparing scales.
All measurements are converted to millimetres before calculating, and results are rounded to two decimal places. Zero or negative values are not accepted.