# 04.03 Effect size guide

## How to calculate it yourself

First of all, let's start with **30mm** being 35 with **Linear Drag Coefficient** being 1. If the firework you want to make is for example 50mm, divide 50 by 30 and multiplicate 35 by that number. In this case:\\

50/30=1.66666666667\
35 \* 1.66666666667 = about. 58, I'll round it up to 60

With this, we got out 50mm effect size. With linear drag coefficient, it is equal to 60. If you want to change the linear drag coefficient and still have the same effect size, you can just make another particle with the drag coefficient being 1 and setting the speed for them to roughly match up. ***If you have a drag coefficient bigger than 1, your speed will need to be higher, if smaller, then your speed will need to be smaller as well.***
