TT Scale (1:120) Calculator & Conversion Chart
Table Top scale · 0.83% of real size
TT ("Table Top") sits between HO and N at exactly 1:120 — one inch to ten feet. Long a niche in the West but mainstream in Eastern Europe, it has seen a revival since major manufacturers reintroduced ready-to-run TT lines.
Precision Scale Conversion Calculator
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TT Scale (1:120) Quick Facts
- 1 real foot = 0.1″ (2.54 mm) on the model
- 1 real meter = 8.33 mm on the model
- A 6 ft (183 cm) person = 15.2 mm (0.6″) tall
- Model is 0.83% of real size — use this as the scale percentage in 3D-print slicers
TT Scale (1:120) Reference Chart
| Real Size | mm | cm | inches |
|---|---|---|---|
| 1 inch | 0.212 mm | 0.021 cm | 0.008″ |
| 1 foot | 2.5 mm | 0.254 cm | 0.1″ |
| 6 ft (person) | 15.2 mm | 1.52 cm | 0.6″ |
| 1 meter | 8.3 mm | 0.833 cm | 0.328″ |
| 3 m (room height) | 25 mm | 2.5 cm | 0.984″ |
| 10 meters | 83.3 mm | 8.33 cm | 3.281″ |
| 30 m (building) | 250 mm | 25 cm | 9.843″ |
Frequently Asked Questions
What is TT scale in mm, cm, and inches?
In TT Scale (1:120), 1 unit on the model equals 120 of the same unit in real life. One real foot equals 0.1 inches (2.54 mm) on the model, one real meter equals 8.33 mm (0.83 cm), and the model is 0.83% of real size.
How tall is a 6 ft person in TT Scale (1:120)?
A 6-foot (183 cm) person stands 15.2 mm (0.6 inches) tall in TT Scale (1:120).
How do I convert a real measurement to TT Scale (1:120)?
Divide the real measurement by 120. For example, a 10 m object is 83.3 mm long in TT Scale (1:120). The calculator on this page does this automatically in both directions.