DASLab / 13
Scale & Units
Drawing scale vs. paper size, and conversion between metric, imperial, and local area units.
Experimental tool — evolving and open to suggestions: info@derzawi.com
Which scale fits my sheet?
1 : 200
landscape · drawing 600 × 400 mm · fills 54% of the usable sheet
Scale ruler
At 1:100, 1 mm on paper = 0.1 m · 1 m real = 10 mm
Unit converter
hectare0.01 ha
square kilometre0.0001 km2
are1 are
square foot1,076.391 ft2
square yard119.599 yd2
acre0.0247 acre
tsubo 坪 · Japan30.25 tsubo1 ken × 1 ken ≈ 3.306 m²
jō 畳 (real-estate) · Japan61.7284 joFair-trade rule minimum 1.62 m²; mat sizes vary by region
feddan · Egypt0.0238 feddan
qirat · Egypt0.5713 qirat1/24 feddan
sahm · Egypt13.7116 sahm1/24 qirat
dunam (metric) · Levant / Middle East0.1 dunam
Paper sizes per ISO 216; scale fit is exact math — printed size = real size ÷ scale ratio.