EVERYDAY CLARITY
Magnification Calculator
How much larger or smaller is an image than its object? Enter the stated values to calculate this model.
Your result
Signed magnification
1
Result for the values shown.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| Object height (mm) | Enter object height in mm; use the same basis as the other measurements. |
| Signed image height (mm) | Enter signed image height in mm; use the same basis as the other measurements. |
Understanding your result
Read Signed magnification (1) in the units and model stated on this page. The formula magnification=imageHeight/objectHeight defines the relationship; measurement accuracy and model applicability are separate from numerical precision.
Common mistakes
- Mixing input units or changing the physical meaning of a variable without changing the model.
Check your calculation
- Use the worked example as a known reference case, then change one input at a time and check the direction and units of the response.
Calculation checks, sources and review limits
How much larger or smaller is an image than its object?
How much larger or smaller is an image than its object? Enter the stated values to calculate this model.
Common uses
- How much larger or smaller is an image than its object
How it works
magnification=imageHeight/objectHeight
Worked example
Enter Object height: 10 mm; Signed image height: -20 mm. Results: Signed magnification: -2 1.