Measurement of various quantities has been an integral part of our lives since ancient times. In this modern era of automation, we need to measure quantities more so than ever. So, what is the importance of Etendue converter? The purpose of Etendue converter is to provide Etendue in the unit that you require irrespective of the unit in which Etendue was previously defined. Conversion of these quantities is equally important as measuring them. Etendue conversion helps in converting different units of Etendue. Etendue is a property of light in an optical system, which characterizes how "spread out" the light is in area and angle.. There are various units which help us define Etendue and we can convert the units according to our requirement. unitsconverters.com provides a simple tool that gives you conversion of Etendue from one unit to another.