Scale Conversion Calculator
Professional scale calculations for architecture, engineering & modeling
Select Calculation Mode
Find Scaled Size
Real Size + Scale Factor
Find Scale Factor
Real Size + Scaled Size
Find Real Size
Scaled Size + Scale Factor
Input Values
:
Result
Enter values and click Calculate to see results
📚 Understanding Scale Conversion
Scale conversion is essential in creating accurate drawings, blueprints, models, and maps. It allows us to represent large real-world objects or small details in a manageable size while maintaining proper proportions.
Scale Factor Format
Scale factors are written as ratios like 1:24 or 1/4″ = 1′
1:24means 1 unit on drawing = 24 units in reality1/4" = 1'means 1/4 inch = 1 foot
🧮 Calculation Formulas
Find Scaled Size
Scaled Size = Real Size ÷ Scale Factor
Find Real Size
Real Size = Scaled Size × Scale Factor
Find Scale Factor
Scale Factor = Real Size ÷ Scaled Size
📐 Common Scale Tables
Architectural Scales
| Scale | Imperial | Use |
|---|---|---|
| 1:24 | 1/2″ = 1′ | Large details |
| 1:48 | 1/4″ = 1′ | Room plans |
| 1:96 | 1/8″ = 1′ | Floor plans |
| 1:192 | 1/16″ = 1′ | Site plans |
Model Scales
| Scale | Type | Details |
|---|---|---|
| 1:12 | Dollhouses | 1″ = 1 foot |
| 1:18 | Diecast cars | Large detail |
| 1:87 | HO trains | Popular scale |
| 1:160 | N scale trains | Compact layouts |
🎯 Practical Examples
Example 1: Architectural Drawing
Problem: A 32-foot wall at 1:48 scale
Solution:
- Convert: 32 ft = 384 inches
- Apply scale: 384 ÷ 48 = 8 inches
- Result: 8 inches on drawing
Example 2: Model Building
Problem: 6-foot person in 1:12 dollhouse
Solution:
- Convert: 6 ft = 72 inches
- Apply scale: 72 ÷ 12 = 6 inches
- Result: 6-inch tall figure