Sqratch Tools / Site & Planning / Drawing Scale Converter
Drawing Scale Converter
Three modes: measure on paper and get real dimensions, size a real element on paper, or find the tightest standard scale that fits your site on a given ISO sheet.
Basis & Assumptions
- Sheet sizes per ISO 216: A0 841×1189, A1 594×841, A2 420×594, A3 297×420, A4 210×297 (mm, trimmed).
- The suggested-scale list (1:1 … 1:2500) reflects common architectural practice: any scale is mathematically valid.
For quick design checks and study, not a substitute for your local Development Control Regulations, NBC provisions, or a licensed professional's judgement. Always verify against the bye-laws that apply to your site.
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