Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Photography
Magnification Ratio Calculator
Calculate the magnification ratio of a lens at a given subject distance β the ratio of subject image size on the sensor to actual subject size. Use it for macro photography planning to predict how large your subject will render and to choose between dedicated macro lenses, extension tubes, or close-up filters.
Fill in the required fields to see your result.
Photography
Field of View Calculator
Calculates the horizontal angle of view in degrees for any focal length and sensor width combination. Use it when choosing a lens for a specific framing or comparing cameras with different sensor sizes.
Fill in the required fields to see your result.
Key differences
| Magnification Ratio Calculator | Field of View Calculator | |
|---|---|---|
| Category | Photography | Photography |
| Inputs required | 2 | 2 |
| Result | Magnification Ratio (:1) | Horizontal Field of View (degrees) |
| What it does | Calculate the magnification ratio of a lens at a given subject distance β the ratio of subject image size on the sensor to actual subject size. Use it for macro photography planning to predict how large your subject will render and to choose between dedicated macro lenses, extension tubes, or close-up filters. | Calculates the horizontal angle of view in degrees for any focal length and sensor width combination. Use it when choosing a lens for a specific framing or comparing cameras with different sensor sizes. |