1:43 Scale Calculator & Conversion Chart

Classic diecast / British O · 2.33% of real size

1:43 grew out of British O gauge railway accessories and became the world’s most collected diecast car scale — Dinky, Corgi, and modern resin manufacturers all use it. A typical car is pocket-sized at around 10 cm.

Precision Scale Conversion Calculator

Real World Size

Scale (1 : N)

Scaled Size

1:43 Scale Quick Facts

1 real foot = 0.279″ (7.09 mm) on the model
1 real meter = 23.26 mm on the model
A 6 ft (183 cm) person = 42.5 mm (1.67″) tall
Model is 2.33% of real size — use this as the scale percentage in 3D-print slicers

1:43 Scale Reference Chart

Real Size	mm	cm	inches
1 inch	0.591 mm	0.059 cm	0.023″
1 foot	7.1 mm	0.709 cm	0.279″
6 ft (person)	42.5 mm	4.25 cm	1.674″
1 meter	23.3 mm	2.33 cm	0.916″
3 m (room height)	69.8 mm	6.98 cm	2.747″
10 meters	232.6 mm	23.26 cm	9.156″
30 m (building)	697.7 mm	69.77 cm	27.467″

Frequently Asked Questions

What is 1:43 scale in mm, cm, and inches?

In 1:43 Scale, 1 unit on the model equals 43 of the same unit in real life. One real foot equals 0.279 inches (7.09 mm) on the model, one real meter equals 23.26 mm (2.33 cm), and the model is 2.33% of real size.

How tall is a 6 ft person in 1:43 Scale?

A 6-foot (183 cm) person stands 42.5 mm (1.67 inches) tall in 1:43 Scale.

How do I convert a real measurement to 1:43 Scale?

Divide the real measurement by 43. For example, a 10 m object is 232.6 mm long in 1:43 Scale. The calculator on this page does this automatically in both directions.