How to Choose the Right Scale for an Architectural Model

Jun 25

Choosing the right scale for an architectural model depends on the model’s purpose, level of detail, and the actual dimensions of the real object. Scale suggestions are general rules of thumb — every project requires its own evaluation.

Always Start With the Real Dimensions

Before selecting a scale, calculate how big the model will be:

Real height
Real footprint
Longest edges
Available display or shipping space

A model that becomes unusually tall or tiny is a sign the scale needs adjusting.

General Rule-of-Thumb Scales

(Actual dimensions always override these guidelines)

1:50 – Interiors, units, hotel rooms
1:100 – Building architecture
1:200 – Mixed-use blocks, TODs
1:500 – Masterplans, large sites
1:1000 – City-scale overview

How to Convert Real Dimensions Into Model Size

Formula:

Model Size = Real Size ÷ Scale

Example 1 — in Imperial Unit

Real object: 420-ft tower
Scale: 1:200
Model height:
420 ÷ 200 = 2.1 ft ≈ 25.2 inches

Example 2 — in Metric Unit

Real object: 120-meter building
Scale: 1:500
Model height:
120 ÷ 500 = 0.24 m = 24 cm