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Calculate camera sensor crop factor online using sensor width and height. Find crop factor, area multiplier, and full-frame equivalent focal length.
| Sensor | Dimensions | Diagonal | Crop Factor |
|---|---|---|---|
| Full Frame / 35mm (36 × 24 mm) | 36 × 24 mm | 43.27 mm | 1.00× |
| APS-H (28.7 × 19 mm) | 28.7 × 19 mm | 34.42 mm | 1.26× |
| APS-C — Canon (22.3 × 14.9 mm) | 22.3 × 14.9 mm | 26.82 mm | 1.61× |
| APS-C — Nikon / Sony / Fuji (23.6 × 15.7 mm) | 23.6 × 15.7 mm | 28.35 mm | 1.53× |
| Four Thirds / Micro Four Thirds (17.3 × 13 mm) | 17.3 × 13 mm | 21.64 mm | 2.00× |
| 1-inch (13.2 × 8.8 mm) | 13.2 × 8.8 mm | 15.86 mm | 2.73× |
| 1/1.7" Compact (7.6 × 5.7 mm) | 7.6 × 5.7 mm | 9.50 mm | 4.55× |
| 1/2.3" Compact / Phone (6.17 × 4.55 mm) | 6.17 × 4.55 mm | 7.67 mm | 5.64× |
| Medium Format (44 × 33 mm) | 44 × 33 mm | 55.00 mm | 0.79× |
A Crop Factor calculator helps you find the crop factor of a camera sensor in seconds. It compares your sensor size with the standard 35mm full-frame sensor.
This tool is useful for photographers, camera buyers, and lens users. You can enter the sensor width and height. The calculator then finds the sensor diagonal and crop factor.
You can also enter a lens focal length. The tool will show its full-frame equivalent focal length.
Crop factor shows how much smaller a camera sensor is than a full-frame sensor. The calculator uses a 36 × 24 mm full-frame sensor as its reference.
A smaller sensor has a higher crop factor. For example, an APS-C sensor often has a crop factor near 1.5×.
This does not change the real focal length of a lens. It changes the field of view compared with full frame.
That makes a Camera Crop Factor Calculator useful when comparing cameras and lenses.
The calculator first finds the sensor diagonal.
Sensor diagonal = √(Sensor width² + Sensor height²)
It then finds the crop factor.
Crop Factor = 43.27 ÷ Sensor diagonal
Or:
Crop Factor = 43.27 ÷ √(Width² + Height²)
Here, 43.27 mm is the diagonal of the 36 × 24 mm full-frame reference sensor.
The calculator also finds the area multiplier.
Area Multiplier = Crop Factor²
If you enter a lens focal length, it calculates the full-frame equivalent.
Equivalent Focal Length = Lens Focal Length × Crop Factor
These formulas form the core of this Sensor Crop Factor Calculator.
The calculator checks that the sensor dimensions are valid. The focal length is optional.
Suppose your camera has an APS-C sensor measuring 23.6 × 15.7 mm.
First, find the sensor diagonal.
Sensor diagonal = √(23.6² + 15.7²)
Sensor diagonal = √(556.96 + 246.49)
Sensor diagonal = √803.45
Sensor diagonal ≈ 28.3452 mm
Now calculate the crop factor.
Crop Factor = 43.27 ÷ 28.3452
Crop Factor ≈ 1.5256×
So, the camera has a crop factor of about 1.5256×.
If you use a 50 mm lens, the full-frame equivalent is:
Equivalent Focal Length = 50 × 1.5256
Equivalent Focal Length ≈ 76.28 mm
So, a 50 mm lens gives a field of view similar to about 76.28 mm on full frame.
A Crop Factor Chart can help you compare common sensor sizes.
A 36 × 24 mm full-frame sensor has a crop factor of about 1×. A 23.6 × 15.7 mm APS-C sensor gives about 1.53× with this calculator. A 17.3 × 13 mm Micro Four Thirds sensor gives about 1.99×.
The exact result depends on the sensor dimensions used.
This also makes the tool useful as an APSC Crop Factor Calculator, Canon Crop Factor Calculator, Fuji Crop Factor Calculator, and Medium Format Crop Factor Calculator when the correct sensor dimensions are entered.
The Crop Factor calculator gives a simple way to compare camera sensors with the 35mm full-frame standard. Enter the sensor width and height to calculate the crop factor. Add a lens focal length to find its full-frame equivalent.
Whether you need a Crop Sensor Calculator, Lens Crop Factor Calculator, or Camera Crop Factor Calculator, this tool provides the key values in one place.
A Crop Factor calculator finds the ratio between a 35mm full-frame sensor diagonal and another camera sensor's diagonal.
Crop Factor = 43.27 ÷ √(Sensor width² + Sensor height²).
A 36 × 24 mm full-frame sensor has a crop factor of about 1×.
Enter the actual APS-C sensor width and height. The calculator finds its diagonal and divides 43.27 mm by that diagonal.
No. A 50 mm lens remains a 50 mm lens. Crop factor changes its field of view compared with full frame.
Yes. Enter the Fuji sensor dimensions, or use the available APS-C Nikon/Sony/Fuji preset when its dimensions match your sensor.
The calculator gets the area multiplier by squaring the crop factor. Area Multiplier = Crop Factor².