Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Field of View Calculator

Calculate the horizontal coverage width (and height) at a given subject distance for any lens, sensor, and crop factor combination. Perfect for planning surveillance setups, portrait framing, or landscape compositions.

Focal Length (mm)

Sensor Width (mm)

Subject Distance (m)

Crop Factor

Fill in the required fields to see your result.

Photography

Exposure Value Calculator

Computes the Exposure Value (EV) at ISO 100 from aperture and shutter speed, giving a single number that represents the total light reaching the sensor. Use it to compare exposure settings or match lighting conditions across scenes.

Aperture (f-stop) (f/)

Shutter Speed (1/s)

Fill in the required fields to see your result.

Key differences

	Field of View Calculator	Exposure Value Calculator
Category	Photography	Photography
Inputs required	4	2
Result	Horizontal Coverage (m)	Exposure Value (EV)
What it does	Calculate the horizontal coverage width (and height) at a given subject distance for any lens, sensor, and crop factor combination. Perfect for planning surveillance setups, portrait framing, or landscape compositions.	Computes the Exposure Value (EV) at ISO 100 from aperture and shutter speed, giving a single number that represents the total light reaching the sensor. Use it to compare exposure settings or match lighting conditions across scenes.