Magnification Calculator

Find magnification from image and object distances.

Image distance

Object distance

Magnification (x) -0.5

Formula: m = − image distance ÷ object distance

Step-by-step with your numbers:

1. Values used:

2. Image distance = 15

3. Object distance = 30

5. Magnification = -0.5x

Did we solve your problem today?

Magnification compares image size to object size.

The math behind it

m = − image distance ÷ object distance. |m| > 1 enlarges; negative means inverted.

image 15, object 30 → −0.5 (half size, inverted).

Negative?

The image is upside-down (real image).