๐ท Photography
Exposure Calculator
Exposure is a balance of three settings that each move in stops, so doubling the shutter time and halving the ISO leaves the image identical. Knowing that any combination summing to the same exposure value is interchangeable is what makes manual shooting practical.
How it works
Exposure value (scene brightness)
ISO
Preferred aperture
Sensor
Shutter speed
Shutter speed as a fraction
Exposure value at ISO 100
Scene brightness
Neutral density to reach 1/2 s
Shutter at ISO 100
Frequently asked questions
How do I use the Exposure Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.