1:20 Scale: cm to mm Reference Table
Quick reference for converting centimeters (cm) to millimeters (mm) at 1:20 scale.
| Real World (cm) | On Drawing (mm) |
|---|---|
| 0.1 cm | 0.05 mm |
| 0.5 cm | 0.25 mm |
| 1 cm | 0.5 mm |
| 2 cm | 1 mm |
| 5 cm | 2.5 mm |
| 10 cm | 5 mm |
| 25 cm | 12.5 mm |
| 50 cm | 25 mm |
| 100 cm | 50 mm |
How to Convert Centimeters (cm) to Millimeters (mm) at 1:20
To convert a real-world measurement in centimeters (cm) to millimeters (mm) on a 1:20 scale drawing, first convert your measurement to millimeters, then divide by the scale ratio (20), and finally convert to your desired output unit (mm).
Formula: Result (mm) = Input (cm) × (10 / 20 / 1)