Are you trying to convert from 1x to hipfire in R6? This is a bit tricky, since the 1x already contains all the sensitivity values for hipfire. So if you change hipfire, you also change the 1x.
What do you mean by 1:1? Same 360 distance? If so, you can use the 360 distance as the source you convert from, then convert to both hipfire and 1x.
Like in this example: https://www.mouse-sensitivity.com/?share=0f73d87e0649a3659820feace294dc6c