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
Macro Magnification Calculator
Compute the image magnification ratio and effective coverage area for macro photography, factoring in focal length, extension tubes, subject distance, and sensor size. Use it to predict how large your subject will appear on the sensor before you shoot.
Fill in the required fields to see your result.
Key differences
| Magnification Ratio Calculator | Macro Magnification Calculator | |
|---|---|---|
| Category | Photography | Photography |
| Inputs required | 2 | 4 |
| Result | Magnification Ratio (:1) | Magnification Ratio (:1) |
| 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. | Compute the image magnification ratio and effective coverage area for macro photography, factoring in focal length, extension tubes, subject distance, and sensor size. Use it to predict how large your subject will appear on the sensor before you shoot. |