Calculators

Photography math, made simple. Plan your shots before you ever pick up the camera.

Near and far focus limits for a given aperture and distance.

The focus distance that maximizes depth of field.

Reproduction ratio for macro photography.

Number of frames needed to cover a subject.

The aperture where diffraction limits sharpness.

Angle of view for a sensor and focal length.

Guide number based flash exposure.

Lens-to-subject distance at a given magnification.

Compare sensor sizes and crop factors.

Full-frame equivalent focal length and aperture.

Equivalent exposure settings when you change aperture or ISO.

Maximum exposure time before stars start to trail.

New shutter speed after adding a neutral density filter.

Maximum print size for your image resolution and DPI.

Slowest shutter speed you can shoot handheld without shake.

Frame count, video duration, and storage for a time-lapse.

Largest centered crop matching a target aspect ratio.