Architectural Scale Converter
Convert between architectural drawing scales instantly. Free tool for architects, engineers, and design students.
Common Architectural Scales
1:1
Full-size details, joinery
1:5 / 1:10
Construction details
1:20 / 1:25
Room layouts, sections
1:50
Detailed floor plans
1:100
Standard floor plans
1:200
Site plans, building elevations
1:500
Site context, masterplans
1:1000+
Urban masterplans, mapping
FAQ
How do I convert between architectural scales?
Enter the real-world measurement in millimeters and select the source and target scales. The converter instantly calculates the drawing dimensions at both scales and provides the conversion factor.
What scale should I use for my architectural drawings?
Use 1:50 for detailed floor plans, 1:100 for standard floor plans, 1:200 for site plans and elevations, and 1:500 or 1:1000 for masterplans. The right scale depends on the level of detail needed and the drawing sheet size.
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