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Proportion Scale Calculator
Scale a quantity up or down by a ratio.
π Free Online Tool
β‘ Instant Results
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Scaled size
Compare Your Options And Get Clear Answers
Scale a quantity up or down by a ratio.
Proportion Scale Estimator
Enter your numbers below for an instant estimate.
0
π‘ Tip: Scaled size = original x (to / from).
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
Proportion Quick Guide
Typical values for reference.
| Scale | Factor | Result from 10 | Use |
|---|---|---|---|
| 1:2 | 2.00 | 20 | Enlarge |
| 1:1 | 1.00 | 10 | Same |
| 2:1 | 0.50 | 5 | Reduce |
| 1:0.25 | 0.25 | 2.5 | Model |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Proportion Scale Calculator FAQ
Answers to common questions about this calculator.
The number you multiply by to resize something.
It gives a quick estimate of proportion scale from the values you enter.
No. It is a planning estimate, so check important figures with a professional or official source.
Yes. Edit any field and the result updates when you calculate.