Free Photography Calculators
Fast, private tools for depth of field, exposure, golden hour and more - right in your browser.
Choose a calculator
Depth of Field CalculatorSee exactly how much of your photo will be in focus, for any camera, lens and aperture.Hyperfocal Distance CalculatorFind the focus distance that keeps everything from half that distance to infinity sharp.Field of View CalculatorWork out the angle of view and how much of a scene your lens covers at any distance.Crop Factor CalculatorConvert focal length and aperture to their full-frame equivalents for any sensor.Aspect Ratio CalculatorFind the ratio of any image and resize it while keeping perfect proportions.Print Size CalculatorSee how big you can print your photo at any resolution, in centimetres and inches.500 Rule CalculatorFind the longest shutter speed for sharp, trail-free stars with any lens.ND Filter CalculatorGet the exact shutter speed to use after screwing on any ND filter.Time-lapse CalculatorPlan interval, clip length, frame count and card space for any time-lapse.Exposure CalculatorFind equivalent exposures and the EV of any aperture, shutter and ISO combination.Sunny 16 CalculatorGet correct exposure settings without a light meter, using the sunny 16 rule.Flash Guide Number CalculatorTurn a flash's guide number into real shooting distance for any aperture and ISO.Golden Hour CalculatorFind today's sunrise, sunset, golden hour and blue hour for your exact location.
More tools
Photography guidesPlain-language guides to the ideas behind the calculators - with links to the tool for each one.Photography calculators by cameraPick your camera for depth-of-field, field-of-view and print-size figures computed from its exact sensor and resolution.Camera sensor sizes comparedSensor dimensions, crop factors and areas for every common format, from medium format to 1-inch.
FAQ
Are these photography calculators free?
Yes - every calculator on Photo-Calc is completely free, with no sign-up and no limits.
Do my inputs or photos leave my device?
No. Every calculation runs locally in your browser; nothing is uploaded to a server.
Do the calculators work on mobile and offline?
Yes. The site is mobile-first and, once a page has loaded, the tools keep working without an internet connection.
Which cameras and sensors are supported?
All common sensor sizes - full frame, APS-C (Canon and Nikon/Sony/Fuji), Micro 4/3, 1-inch and medium format - so results match your gear.