Photography
Camera and lens calculators for photographers: depth of field, hyperfocal distance, crop factor, field of view, exposure value and more, with the optics explained.
Aperture Area Calculator
Calculate the physical aperture diameter and area from focal length and f-number. See how area scales with the square of the f-stop. Free and instant.
Crop Factor Calculator
Find your sensor crop factor versus full frame and the 35mm-equivalent focal length and f-number. Works for APS-C, Micro 4/3 and any sensor size. Free.
Depth of Field Calculator
Calculate depth of field from focal length, aperture and focus distance. Get the near limit, far limit, total DoF and hyperfocal distance. Free and instant.
Exposure Value Calculator
Calculate exposure value from aperture and shutter speed, adjusted for ISO. Get EV at ISO 100 and at your ISO to compare exposures by stops. Free and instant.
F-Stop Calculator
Calculate the stops of light between two f-stops and the light ratio. See which aperture is brighter and by how much. Free and instant.
Field of View Calculator
Calculate the angle of view and subject coverage for any lens and sensor. Get horizontal, vertical and diagonal angles plus the scene width at a distance. Free.
Flash Guide Number Calculator
Calculate flash guide number, aperture or distance from the GN = aperture x distance rule, with ISO scaling. Solve any one from the other two. Free.
Hyperfocal Distance Calculator
Find the hyperfocal distance for any lens and aperture. Focus there for maximum depth of field, sharp from half that distance to infinity. Free and instant.
Megapixel Calculator
Calculate megapixels from pixel dimensions, or find the pixel grid for a target megapixel count at any aspect ratio. Free and instant.
Print Resolution Calculator
Find the largest print size from your image pixels at a target DPI. Get print width and height in inches and centimetres plus the megapixels. Free and fast.
Sunny 16 Calculator
Use the Sunny 16 rule to set exposure without a meter. Get the shutter speed for your ISO at f/16 and equivalent settings for cloud and shade. Free.
Time-Lapse Calculator
Plan a time-lapse from shooting time, interval and fps, or work backward from a target clip length. Get frames, clip length and shoot time. Free.