The Sunny 16 rule is a classic way to get a correct exposure in daylight without a light meter: on a bright sunny day set the aperture to f/16 and the shutter speed to roughly one over your ISO. This calculator extends that idea to a range of lighting conditions, so you pick how bright it is and it gives you a matching aperture and shutter speed for your chosen ISO. It also lists equivalent exposures, letting you swap to a wider aperture with a faster shutter while keeping the same brightness. Film photographers and anyone shooting a manual camera use this to nail exposure by eye, and it is a great way to build intuition for how aperture, shutter, and ISO trade off. Every calculation runs locally in your browser with nothing sent to a server.
The Sunny 16 rule is a classic way to get a correct exposure in daylight without a light meter: on a bright sunny day set the aperture to f/16 and the shutter speed to roughly one over your ISO. This calculator extends that idea to a range of lighting conditions, so you pick how bright it is and it gives you a matching aperture and shutter speed for your chosen ISO.
Yes. Sunny 16 Rule Calculator is completely free, with no sign-up and no usage limits.
Yes. Sunny 16 Rule Calculator runs in any modern web browser. There is nothing to download or install.
Yes. Sunny 16 Rule Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.