Comparison of common scales and gauges
All dimensions in decimal inches
Examples taken from German rolling stock
| Gauge | Proportion | Track gauge | proportional min. radius | industrial min. radius | Length Class 01 | Length Class 89 | Length 4-axle coach | Length 2-axle freight | Height clearance |
| 1:1 | 56.5000 | 7086.6100 | 940.9400 | 346.4600 | 1039.3700 | 366.1400 | 236.2200 | ||
| I | 1:32 | 1.7700 | 220.4700 | 23.62000 | 29.4100 | 10.7900 | 32.4800 | 11.4600 | 7.0900 |
| O | 1:45 | 1.2500 | 157.4800 | 27.56000 | 20.9100 | 7.6800 | 23.1100 | 8.1500 | 5.0000 |
| H0 | 1:87 | 0.6490 | 82.6770 | 13.77900 | 10.9450 | 3.9760 | 11.9290 | 4.2120 | 2.7160 |
| TT | 1:120 | 0.4724 | 59.0550 | 11.22050 | 7.8350 | 2.8740 | 8.6610 | 3.0700 | 2.0470 |
| N | 1:160 | 0.3543 | 43.3070 | 7.67700 | 5.8661 | 2.1653 | 6.4960 | 2.2830 | 1.5354 |
| Z | 1:220 | 0.2559 | 33.4645 | 5.70866 | 4.2913 | 1.5748 | 4.7244 | 1.6535 | 1.1024 |
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© 2009 by Erhard Baltrusch, Hamburg, Germany