Scale Conversion Chart

Here are the percentages I use when converting between common model railroad scales:

O to S = 75%

O to HO= 55.2%

O to N= 30%

S to O= 133%

S to HO= 73.6%

S to N= 40%

HO to O= 181.3%

HO to S= 136%

HO to N= 54.4%

N to O= 333.3%

N to S= 250%

N to HO= 184%