Convert Length in One Scale to Other Scales


Enter the length itself and the select the scale that the length is in:





If the scale ratio you are converting from is not listed in the drop down above, you can enter it manually.

For example, if you want to calculate a ratio of 1:100, simply enter 100 in the Scale Ratio field below:




If the scale ratio you want to convert to is not listed in the table at the bottom of the page, you can enter it manually below:








Note: The scale calculations made on these pages use the scale ratios in the table below. As these ratios are used, a length calculated in 4mm scale will not be twice the same length calculated in 2mm scale.

2mm scale (US/EU N)1:160
2mm scale (2mm FS)1:152.3
2mm scale (British N)1:148
3mm scale (British TT)1:101.6
3.5mm scale (HO)1:87.1
4mm scale (OO, EM, P4)1:76.2
7mm scale (O)1:43.5




Application created by John Donnelly, Copyright © 2020, Version 1.0.201116.0