Scale Weight Calculators
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Formula: 1-ounce plus 1/2-ounce for each inch of car length.
HO Scale, 1:87
Prototype Length to Model Weight
Prototype Length
(in feet)
Enter feet
Model Weight
(in ounces)
-5%
Recommended
+10%
HO Scale, 1:87
Model Length to Model Weight
Model Length
(in inches)
Enter inches
Model Weight
(in ounces)
-5%
Recommended
+10%