1:75 Scale (1/75) Calculator & Conversion Chart

Ship kits & 1:72’s metric cousin · 1.33% of real size

1:75 lives in 1:72’s shadow — the two are only 4% apart, so the question behind most searches for it is “will this fit my 1:72 collection?” (visually, yes: side by side the difference is barely perceptible). It earned its own niche through ship models — Heller’s big sailing-ship kits among them — and as a tidy metric ratio it also appears in European architectural models.

Precision Scale Converter & Calculator

Real World Size

Scale (1 : N)

Scaled Size

1:75 Scale Quick Facts

Scale factor: 1 ÷ 75 — written 1:75 or 1/75 (1.33% of real size)
1 real foot = 0.16″ (4.06 mm) on the model
1 real meter = 13.33 mm (1.33 cm) on the model
A 6 ft (183 cm) person = 24.4 mm (0.96″) tall
Model is 1.33% of real size — use this as the scale percentage in 3D-print slicers

1:75 Scale Reference Chart

Real Size	mm	cm	inches
1 inch	0.339 mm	0.034 cm	0.013″
1 foot	4.1 mm	0.406 cm	0.16″
6 ft (person)	24.4 mm	2.44 cm	0.96″
1 meter	13.3 mm	1.33 cm	0.525″
3 m (room height)	40 mm	4 cm	1.575″
10 meters	133.3 mm	13.33 cm	5.249″
30 m (building)	400 mm	40 cm	15.748″

Frequently Asked Questions

What is 1:75 scale in mm, cm, and inches?

In 1:75 Scale, 1 unit on the model equals 75 of the same unit in real life. One real foot equals 0.16 inches (4.06 mm) on the model, one real meter equals 13.33 mm (1.33 cm), and the model is 1.33% of real size.

How tall is a 6 ft person in 1:75 Scale?

A 6-foot (183 cm) person stands 24.4 mm (0.96 inches) tall in 1:75 Scale.

How do I convert a real measurement to 1:75 Scale?

Divide the real measurement by 75. For example, a 10 m object is 133.3 mm long in 1:75 Scale. The calculator on this page does this automatically in both directions.

Is 1/75 the same as 1:75 Scale?

Yes — "1/75", "1:75", and "1:75 Scale" all describe the same ratio. The scale factor is 1 ÷ 75, so the model is 1.33% of real size. Enter 75 in the calculator above to convert any measurement to or from this scale.