ArchMM vs Archelle

Scale, measure, and calculate with ArchMM. A practical calculator for designers, model makers, builders, architects, and students—built around feet, inches, fractions, and architectural scale. MODEL SCALE Convert full-size feet and inches to model millimeters for 3D printing and model making, or work backward from a model measurement. Choose 1:1 or common architectural scales and compare the converted length with a printer-bed preset. CARPENTER CALCULATOR Use dedicated number, unit, fraction, and arithmetic buttons. Add and subtract dimensions, multiply lengths into area or volume, recall memory, and revisit recent calculations. The next number after equals starts a new calculation. SCALE TO INCHES Enter a full-size measurement and get its scaled size in inches. Change the drawing scale at any time. PROJECT TOOLS Calculate board feet, explore a stair layout, and work out common-rafter geometry. Each tool explains its assumptions. These are geometry estimates, not structural design or code-compliance approval. MADE FOR EVERYDAY WORK • Copy results for your next task • Light, Dark, and System appearance • On-device calculations with no account, ads, analytics, or tracking • No internet connection needed for calculations Printer checks compare one converted length with the bed dimensions. Confirm the complete part geometry, orientation, and clearances in your slicer.

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.