Lens Formula Calculator
Solve thin-lens focal length, object distance or image distance with magnification and a ray diagram.
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What Is the Lens Formula Calculator?
The Lens Formula Calculator solves the signed thin-lens equation for focal length, object distance or image distance and derives magnification, image orientation and real-versus-virtual status.
How It Works
Select the unknown and enter the other two signed distances in one unit. Review the numerical result with the normalized ray diagram.
When to Use It
Use it for introductory geometric optics and ideal thin-lens checks. Real multi-element lenses require manufacturer or optical-design data.
Frequently Asked Questions
- Why Are Some Distances Negative?
- Signed-distance conventions distinguish real and virtual objects or images. Keep one convention throughout the worksheet.
- Is This The Same As A Camera Field-Of-View Calculator?
- No. This solves image formation; field of view additionally depends on sensor dimensions.
Found an issue? Send Feedback. See our data sources and update policy for tools that depend on changing information.
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