Free Online Camera Field of View Calculator
- Nathaniel Stephan
- December 29, 2025
Table of Contents
Reference Camera
Equivalent Settings on Other Sensors
| Sensor | Sensor Size | Crop Factor | Required Focal Length | FF Equivalent | Horizontal FOV |
|---|
A Field of View (FoV) calculator tells you what a lens is capable of capturing. It uses the size of a sensor and the focal length of a lens to figure out the angle of view.
Why is knowing the field of view useful?
Photographers use these calculators to plan their shots before they even arrive at a location. For example, if you are standing in a small room, a calculator helps you choose a lens wide enough to fit everyone in the family photo.
If you are a landscape photographer, it helps you know if a massive mountain will fit inside your frame or if you need to stand further back. It takes the guesswork out of gear selection so you always have the right lens for the job.