1:100 Scale Calculator & Conversion Chart

Building model standard · 1% of real size

1:100 renders a whole building at presentation size — 1 cm per meter, so a 30 m facade becomes a 30 cm model. It is the most common competition-model scale and conveniently identical to the wargamer’s 15mm, doubling the accessory market.

Precision Scale Converter & Calculator

Real World Size

Scale (1 : N)

Scaled Size

1:100 Scale Quick Facts

Scale factor: 1 ÷ 100 (1% of real size)
1 real foot = 0.12″ (3.05 mm) on the model
1 real meter = 10 mm (1 cm) on the model
A 6 ft (183 cm) person = 18.3 mm (0.72″) tall
Model is 1% of real size — use this as the scale percentage in 3D-print slicers

1:100 Scale Reference Chart

Real Size	mm	cm	inches
1 inch	0.254 mm	0.025 cm	0.01″
1 foot	3 mm	0.305 cm	0.12″
6 ft (person)	18.3 mm	1.83 cm	0.72″
1 meter	10 mm	1 cm	0.394″
3 m (room height)	30 mm	3 cm	1.181″
10 meters	100 mm	10 cm	3.937″
30 m (building)	300 mm	30 cm	11.811″

Frequently Asked Questions

What is 1:100 scale in mm, cm, and inches?

In 1:100 Scale, 1 unit on the model equals 100 of the same unit in real life. One real foot equals 0.12 inches (3.05 mm) on the model, one real meter equals 10 mm (1.00 cm), and the model is 1% of real size.

How tall is a 6 ft person in 1:100 Scale?

A 6-foot (183 cm) person stands 18.3 mm (0.72 inches) tall in 1:100 Scale.

How do I convert a real measurement to 1:100 Scale?

Divide the real measurement by 100. For example, a 10 m object is 100.0 mm long in 1:100 Scale. The calculator on this page does this automatically in both directions.

Is 1/100 the same as 1:100 Scale?

Yes — "1/100", "1:100", and "1:100 Scale" all describe the same ratio. The scale factor is 1 ÷ 100, so the model is 1% of real size. Enter 100 in the calculator above to convert any measurement to or from this scale.