Compare calculators

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

Studio Lighting Calculator

Determines the fill light power needed to achieve a desired lighting ratio in a multi-light studio setup. Use it when balancing key and fill lights for portrait or product photography.

Key Light Power (watts)

Key Light Distance (meters)

Fill Light Distance (meters)

Desired Lighting Ratio

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

	Studio Lighting Calculator	Exposure Value Calculator
Category	Photography	Photography
Inputs required	4	2
Result	Fill Light Power Required (watts)	Exposure Value (EV)
What it does	Determines the fill light power needed to achieve a desired lighting ratio in a multi-light studio setup. Use it when balancing key and fill lights for portrait or product photography.	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.