The Exposure Calculator is an invaluable tool for photographers aiming to achieve the perfect exposure in their images. By understanding the relationship between aperture, shutter speed, and ISO, you can optimize your camera settings and improve the overall quality of your photographs. Mastering exposure is essential for capturing well-balanced images that showcase your subject matter and artistic vision.

What is Exposure?

Exposure refers to the amount of light captured by your camera’s sensor when taking a photograph. A well-exposed image has a balance of light and dark areas, with details clearly visible in both highlights and shadows. Underexposed images are too dark, with lost details in the shadows, while overexposed images are too bright, with blown-out highlights. To achieve the correct exposure, you need to understand and manipulate the three components of the exposure triangle: aperture, shutter speed, and ISO.

Using the Exposure Calculator

This calculator helps you find the optimal settings for your camera to achieve your desired exposure. To use the calculator, enter the following information:

Aperture (f-stop)

Enter the aperture value, expressed as an f-stop number (e.g., f/2.8, f/4). The aperture refers to the size of the lens opening, which controls the amount of light that enters the camera. A larger aperture (smaller f-stop number) allows more light to enter, while a smaller aperture (larger f-stop number) allows less light.

Shutter Speed

Enter the shutter speed in seconds or fractions of a second (e.g., 1/60, 1/125). Shutter speed is the length of time the camera’s sensor is exposed to light. A faster shutter speed (shorter duration) freezes motion and reduces the amount of light entering the camera, while a slower shutter speed (longer duration) allows more light and may introduce motion blur.


Enter the ISO value, which is a measure of your camera sensor’s sensitivity to light. A lower ISO value (e.g., 100, 200) results in less noise but requires more light, while a higher ISO value (e.g., 800, 1600) increases the sensor’s sensitivity to light but may introduce more noise into the image.

After entering the required information, the calculator will display the recommended settings for your camera to achieve the desired exposure. You can use these recommendations to adjust your camera settings and capture well-exposed images.

Mastering exposure is crucial for improving the quality of your photographs. By understanding the exposure triangle and how to manipulate aperture, shutter speed, and ISO, you can capture images with the perfect balance of light and dark areas. This knowledge allows you to create stunning, well-exposed photographs that showcase your subject matter and artistic vision.