Arch
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On drawing

20mm

At 1:50 scale, 1 m in reality becomes 20 mm on paper.

Scale Reference

Full library →

Architectural

1:1Detail drawings1:2Component details1:5Wall sections1:10Furniture layouts1:20Room plans1:25Room layouts+9 more

Engineering

1:10Mechanical details1:20Structural connections1:50Structural plans1:100General arrangements1:200Site grading plans1:500Topographic surveys+2 more

Model & Miniature

1:6Action figures (12")1:8Premium model cars1:12Dollhouses1:16Farm equipment models1:18Diecast model cars1:24Plastic model kits+14 more

Map & Survey

1:1,000Urban surveys1:2,500Topographic mapping1:5,000Town planning1:10,000Hiking maps (detailed)1:25,000Hiking / OS Explorer maps1:50,000OS Landranger maps+4 more

FAQ

What is a scale ratio?
1:50 means 1 unit on paper = 50 units real. So 1 mm on a 1:50 drawing = 50 mm real.
How to convert real → scale?
Divide real measurement by scale factor. At 1:100, a 5 m wall = 50 mm on paper.
Common architectural scales?
1:50 floor plans, 1:100 general arrangements, 1:200 site plans, 1:5 details.
Popular model scales?
Military 1:35, aircraft 1:72, railways 1:87 (HO), cars 1:24.