Exposure value is a single number that captures how a given aperture and shutter speed combine to expose an image, and it is the language photographers use to describe brightness in a scene. This calculator takes your aperture, shutter speed, and ISO and returns the exposure value, using the standard definition where EV equals the base two logarithm of the aperture squared divided by the shutter time. It also gives the light value normalized to ISO 100, which lets you compare the brightness of different scenes regardless of your sensitivity setting. Every full stop you open the aperture, halve the shutter time, or double the ISO shifts the exposure by one EV. This helps you understand equivalent exposures, dial in manual settings, and read a light meter. All the math happens in your browser, so nothing you enter is sent to a server.
Exposure value is a single number that captures how a given aperture and shutter speed combine to expose an image, and it is the language photographers use to describe brightness in a scene. This calculator takes your aperture, shutter speed, and ISO and returns the exposure value, using the standard definition where EV equals the base two logarithm of the aperture squared divided by the shutter time.
Yes. Exposure Value (EV) Calculator is completely free, with no sign-up and no usage limits.
Yes. Exposure Value (EV) Calculator runs in any modern web browser. There is nothing to download or install.
Yes. Exposure Value (EV) Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.