1:150 Scale (1/150) Calculator & Conversion Chart

Japanese N gauge & site models · 0.67% of real size

1:150 is the Japanese N scale standard: Kato and Tomix model Japanese prototypes at 1:150 on the same 9 mm track that carries 1:160 stock elsewhere (British N runs 1:148 — three body scales, one gauge). Outside railroading it is a convenient metric ratio for architectural site models, sitting between 1:100 and 1:200.

Precision Scale Converter & Calculator

Real World Size

Scale (1 : N)

Scaled Size

1:150 Scale Quick Facts

Scale factor: 1 ÷ 150 — written 1:150 or 1/150 (0.67% of real size)
1 real foot = 0.08″ (2.03 mm) on the model
1 real meter = 6.67 mm (0.67 cm) on the model
A 6 ft (183 cm) person = 12.2 mm (0.48″) tall
Model is 0.67% of real size — use this as the scale percentage in 3D-print slicers

1:150 Scale Reference Chart

Real Size	mm	cm	inches
1 inch	0.169 mm	0.017 cm	0.007″
1 foot	2 mm	0.203 cm	0.08″
6 ft (person)	12.2 mm	1.22 cm	0.48″
1 meter	6.7 mm	0.667 cm	0.262″
3 m (room height)	20 mm	2 cm	0.787″
10 meters	66.7 mm	6.67 cm	2.625″
30 m (building)	200 mm	20 cm	7.874″

Frequently Asked Questions

What is 1:150 scale in mm, cm, and inches?

In 1:150 Scale, 1 unit on the model equals 150 of the same unit in real life. One real foot equals 0.08 inches (2.03 mm) on the model, one real meter equals 6.67 mm (0.67 cm), and the model is 0.67% of real size.

How tall is a 6 ft person in 1:150 Scale?

A 6-foot (183 cm) person stands 12.2 mm (0.48 inches) tall in 1:150 Scale.

How do I convert a real measurement to 1:150 Scale?

Divide the real measurement by 150. For example, a 10 m object is 66.7 mm long in 1:150 Scale. The calculator on this page does this automatically in both directions.

Is 1/150 the same as 1:150 Scale?

Yes — "1/150", "1:150", and "1:150 Scale" all describe the same ratio. The scale factor is 1 ÷ 150, so the model is 0.67% of real size. Enter 150 in the calculator above to convert any measurement to or from this scale.