Depth of Field Calculator

Calculate depth of field for photography with this free online tool. Input focal length, aperture, distance, and sensor size to get precise DOF measurements.

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About This Tool

This depth of field calculator helps photographers determine the zone of acceptable sharpness in an image. By entering the focal length (in mm), aperture (f-number), distance to subject (in meters or feet), and sensor size (crop factor or dimensions), the tool calculates the near limit of acceptable sharpness, far limit, total depth of field, and hyperfocal distance. The calculator uses standard optical formulas to provide accurate results for any camera setup, making it essential for planning shots with precise focus requirements.

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How to Use

Enter the focal length of your lens in millimeters (e.g., 50mm).
Enter the aperture (f-number) like f/
8 or
Enter the distance to your subject in meters or feet.
Select your camera's sensor size from the dropdown (common options like Full Frame, APS-C, Micro Four Thirds are included).
Click the 'Calculate Depth of Field' button to see results including near limit, far limit, total depth, and hyperfocal distance.
Use the unit toggle to switch between meters and feet as needed.

Frequently Asked Questions

Find Quick Answers

What is depth of field?

Depth of field (DOF) is the distance between the nearest and farthest objects in a photo that appear acceptably sharp. It depends on focal length, aperture, distance to subject, and sensor size.

How is hyperfocal distance calculated?

Hyperfocal distance is calculated using the formula: H = (f^2)/(N*c) + f, where f is focal length, N is aperture number, and c is circle of confusion (based on sensor size). It's the focus distance that maximizes depth of field from half that distance to infinity.

What sensor sizes are supported?

The calculator includes common sensor sizes: Full Frame (35mm), APS-C (1.5x and 1.6x crop), Micro Four Thirds (2x crop), and 1-inch sensor. You can also select custom to enter exact dimensions.

Can I use this calculator for video?

Yes, the depth of field principles are the same for photography and videography. The calculator works for any imaging application where you need to control focus zones.

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