Free Online Scale Converter
Convert measurements between any scales instantly.
Scale Calculator
Converted value
50.000 mm
Original value
100.00 mm
Source scale
1:50
Target scale
1:100
Real
5000.00 mm
Also in mm
50.000
Also in cm
5.000
Also in m
0.0500
Visual comparison
1:50
1:100
Step-by-step calculation
- 1Real size = measurement × source scale denominator:
100.00 × 50 = 5000.00 mm - 2Converted size = real size ÷ target scale denominator:
5000.00 ÷ 100 = 50.000 mm
Popular scales
One tap to load common ratios.
Common uses
Trusted by professionals across disciplines.
Architecture
Floor plans, elevations and site plans at standard ratios.
Engineering
Technical drawings and mechanical part scaling.
Model Making
Trains, cars, dioramas — perfect miniature ratios.
3D Printing
Resize STL models to fit your build plate.
Construction
Blueprint reading and on-site measurements.
Interior Design
Room layouts and furniture placement plans.
Frequently asked questions
A scale converter translates measurements between two ratios — for example from a 1:50 architectural drawing to a 1:100 print — by computing the real-world size first, then re-scaling it to the target.
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