Depth of field (DOF) is one of the most important creative tools in photography. It determines how much of your image appears sharp in front of and behind your point of focus. This online Depth of Field Calculator helps you quickly understand how focal length, aperture, sensor size, and subject distance affect DOF in real shooting situations.
Simply choose your camera format, set an aperture value, enter the focal length of your lens, and specify the distance to your subject. The calculator instantly provides your near and far focus limits, total depth of field, and hyperfocal distance — a powerful concept that landscape photographers use to maximize sharpness from foreground to infinity.
Using a DOF calculator is especially helpful when working with wide apertures, telephoto lenses, or close-up subjects, where depth of field becomes extremely shallow. It’s also useful for planning portrait sessions, macro photography, or landscape compositions where precise control over sharpness is essential.
Whether you’re a beginner learning how aperture affects focus or an advanced photographer fine-tuning your setup, this DOF calculator offers a fast, accurate way to visualize depth of field before you take the shot.