Camera Field of View Calculator
Find horizontal and vertical viewing angles from sensor dimensions and focal length.
Your inputs
Calculation results
Formula & assumptions
Field angle = 2 atan(sensor dimension/(2 focal length)); rectilinear lens approximation.
Values use the specified units. Calculations use floating-point arithmetic. Check input measurements and formula assumptions before applying the result.
Compare your scenarios
Save up to five results to compare changes side by side. Scenarios stay in this tab until you clear or reload it.
Using Camera Field of View Calculator
Find horizontal and vertical viewing angles from sensor dimensions and focal length.
- Enter sensor width, sensor height, focal length using the units printed under each field.
- Choose Calculate, or enable live updates. Review the result labels and formula assumptions.
- Save scenarios to compare up to five variations, then copy the report or download JSON or CSV.
Example
Sensor width: 36 millimeters Sensor height: 24 millimeters Focal length: 50 millimeters Horizontal angle · degrees: 39.597753 Vertical angle · degrees: 26.991467 Diagonal angle · degrees: 46.793003
Questions & answers
What does Camera Field of View Calculator calculate?
Find horizontal and vertical viewing angles from sensor dimensions and focal length.
Which units should I enter?
Sensor width uses millimeters. Sensor height uses millimeters. Focal length uses millimeters. Convert values to these units before calculating.
Which formula does it use?
Field angle = 2 atan(sensor dimension/(2 focal length)); rectilinear lens approximation.
What does the included example show?
Sensor width: 36 millimeters; Sensor height: 24 millimeters; Focal length: 50 millimeters. Result: Horizontal angle · degrees = 39.597753; Vertical angle · degrees = 26.991467; Diagonal angle · degrees = 46.793003.
Can I compare different settings?
Yes. Save a scenario, change the inputs and save another result. Up to five scenarios are compared in this tab; they disappear when you reload or leave.
Can I export the calculation?
Copy the JSON report or download JSON and CSV with inputs, result labels and numeric values. Processing uses local JavaScript; no calculation request is sent to our server. Displayed values use up to 10 significant digits; exports retain JavaScript numeric precision.
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