クロップファクター計算機

共有リンク

はじめに

Crop Factor Calculator — Determine a sensor's crop factor relative to full-frame (43.3mm diagonal). Enter Sensor Width, Sensor Height to get an instant, accurate result.

計算式

Sensor diagonal = √(sensor width² + sensor height²), by the Pythagorean theorem. Crop factor = 43.3mm (full-frame diagonal) / sensor diagonal.

ステップごとの説明

Enter the Sensor Width.
Enter the Sensor Height.
Click Calculate to see your result instantly.

実例

Example: With Sensor Width = 23.5 mm, Sensor Height = 15.6 mm, the Crop Factor Calculator gives Sensor Diagonal Mm: 28.2066, Crop Factor: 1.5351.

よくある質問

What does a crop factor of 1.5 mean?

The sensor's diagonal is 1/1.5 the size of a full-frame sensor's diagonal, so a given focal length captures a narrower field of view than it would on full frame.

Is a smaller sensor always a crop factor above 1?

Yes — any sensor smaller than full frame (36×24mm) has a crop factor greater than 1; a sensor larger than full frame (medium format) has a crop factor below 1.

What inputs does the Crop Factor Calculator need?

You'll need to provide: Sensor Width, Sensor Height. All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.

How accurate is the Crop Factor Calculator?

The Crop Factor Calculator applies the formula exactly as calculated — Sensor diagonal = √(sensor width² + sensor height²), by the Pythagorean theorem. Crop factor = 43.3mm (full-frame diagonal) / sensor diagonal. — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.

Is the Crop Factor Calculator free to use?

Yes, the Crop Factor Calculator is completely free, requires no signup, and runs instantly in your browser.