1:1000 Scale Calculator & Conversion Chart

Master plan & harbor scale · 0.1% of real size

1:1000 compresses a kilometer into a meter — the scale of city master plans, harbor and airport models, and collectible miniature ocean liners. The conversion is pure decimal shifting: 1 real meter is exactly 1 mm, so you can read dimensions straight off a metric plan.

Precision Scale Conversion Calculator

Real World Size

Scale (1 : N)

Scaled Size

1:1000 Scale Quick Facts

1 real foot = 0.012″ (0.3 mm) on the model
1 real meter = 1 mm on the model
A 6 ft (183 cm) person = 1.8 mm (0.07″) tall
Model is 0.1% of real size — use this as the scale percentage in 3D-print slicers

1:1000 Scale Reference Chart

Real Size	mm	cm	inches
1 inch	0.025 mm	0.003 cm	0.001″
1 foot	0.305 mm	0.03 cm	0.012″
6 ft (person)	1.8 mm	0.183 cm	0.072″
1 meter	1 mm	0.1 cm	0.039″
3 m (room height)	3 mm	0.3 cm	0.118″
10 meters	10 mm	1 cm	0.394″
30 m (building)	30 mm	3 cm	1.181″

Frequently Asked Questions

What is 1:1000 scale in mm, cm, and inches?

In 1:1000 Scale, 1 unit on the model equals 1000 of the same unit in real life. One real foot equals 0.012 inches (0.3 mm) on the model, one real meter equals 1 mm (0.10 cm), and the model is 0.1% of real size.

How tall is a 6 ft person in 1:1000 Scale?

A 6-foot (183 cm) person stands 1.8 mm (0.07 inches) tall in 1:1000 Scale.

How do I convert a real measurement to 1:1000 Scale?

Divide the real measurement by 1000. For example, a 10 m object is 10.0 mm long in 1:1000 Scale. The calculator on this page does this automatically in both directions.