Lens focal length to horizontal angle of view
Type a value in mm to get it in ° horizontal instantly.
54.43° horizontal
That's 1.35× as long as a phone’s main camera, while a normal lens is 1.43× longer.
Convert the other way: ° horizontal to mm
What it means
How wide does it see?
Angles are for a rectilinear lens focused at infinity on a 3:2 frame. Fisheye lenses and close focusing change them.
The math
How to convert mm to ° horizontal
Angle of view is 2 × arctan(d ÷ 2f), with d the frame’s width, height or diagonal (36, 24 or 43.3 mm for full frame) and f the 35 mm-equivalent focal length.
Example: 35 mm = 54.4322 ° horizontal.
Lens focal lengths below are for Full frame (crop 1). Change it above and they update.
Every unit
Your lens in every unit
Tables
mm to ° horizontal conversion table
| mm | ° horizontal |
|---|---|
| 10 mm | 121.891 ° horizontal |
| 14 mm | 104.25 ° horizontal |
| 16 mm | 96.7329 ° horizontal |
| 18 mm | 90 ° horizontal |
| 24 mm | 73.7398 ° horizontal |
| 28 mm | 65.4705 ° horizontal |
| 35 mm | 54.4322 ° horizontal |
| 50 mm | 39.5978 ° horizontal |
| 85 mm | 23.9132 ° horizontal |
| 105 mm | 19.4552 ° horizontal |
| 135 mm | 15.1893 ° horizontal |
| 200 mm | 10.2855 ° horizontal |
| 300 mm | 6.86726 ° horizontal |
| 600 mm | 3.43672 ° horizontal |
° horizontal to mm conversion table
| ° horizontal | mm |
|---|---|
| 3.44 ° horizontal | 599.427 mm |
| 6.87 ° horizontal | 299.88 mm |
| 10.3 ° horizontal | 199.717 mm |
| 15.2 ° horizontal | 134.904 mm |
| 19.5 ° horizontal | 104.754 mm |
| 23.9 ° horizontal | 85.0482 mm |
| 39.6 ° horizontal | 49.9969 mm |
| 54.4 ° horizontal | 35.0242 mm |
| 65.5 ° horizontal | 27.9841 mm |
| 73.7 ° horizontal | 24.0174 mm |
| 90 ° horizontal | 18 mm |
| 96.7 ° horizontal | 16.0093 mm |
| 104 ° horizontal | 14.0631 mm |
| 122 ° horizontal | 9.97756 mm |
Quick answers
Quick answers
- How many ° horizontal is 1 mm?
- 1 mm is 173.64 ° horizontal.
- How many ° horizontal is 10 mm?
- 10 mm is 121.891 ° horizontal.
- How many ° horizontal is 35 mm?
- 35 mm is 54.4322 ° horizontal.
The units
About these units
Lens focal length (mm)
The number printed on the lens, for the sensor chosen above.
Horizontal angle of view (° horizontal)
Across the long side of the frame.
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