Inverse Square Law Calculator

The Inverse square law states that a specified physical quantity or intensity is inversely proportional to the square of the distance from the source of that physical quantity, there are more than one intensity/distance involved. Use our simple online Inverse square law calculator to find the intensity/distance. In the drop down, select the one you want to calculate, either intensity 1/intensity 2/distance 1/distance 2 and enter the values for the remaining three.

m
m
Candela
Candela
This inverse square law calculator takes the inputs of intensity/distance and finds the other. In other words, the law can be stated as "the intensity and the distance squared at one location is equal to the intensity, distance squared at another location".