Archelle

Archelle helps architects and architecture students convert measurements for drawings and models. FROM PLAN TO REALITY Convert from a plan to reality, from reality to a plan, or directly between two scales. Choose length, area or volume: Archelle applies the corresponding scale factor, squared for areas and cubed for volumes. YOUR UNITS, YOUR SCALE Convert mm, cm, m or km, including square and cubic units. Choose a standard scale from 1:1 to 1:1,000, or enter a custom scale, including enlargements. INSTANT RESULTS The result stays visible while you type. Reverse the conversion, copy the value or share the result with its context. Rounded results are marked with ≈. UNDERSTAND THE CALCULATION Built-in help explains scales and length, area and volume factors with practical examples. DESIGNED FOR IPHONE AND IPAD Available in French, English and Korean, with light and dark appearances, larger text support and VoiceOver labels. Free, with no ads or in-app purchases. Calculations work offline with no account. Archelle does not collect your measurements or save them between sessions. Copied or shared values follow the settings of the system and recipient apps. Use the scale that matches the document’s intended print size. A resized plan may have a different scale. The app’s dimension line is a visual reference, not a physical ruler.