Convert analog signal (%) to another unit

Configuration
1

Hi Community,
I hope you can help me, to find a solution.
I have connected a pressure sensor (Amazon.de) on Shelly Plus Addon, which is installed on a pool filter pump. I want to readout the pressure in “BAR”.
The output from shelly addon is in percent.
My measure results:
19,5 % = 1,0 BAR
21.1 % = 1,1 BAR
22,5 % = 1,2 BAR
25,0 % = 1,3 BAR
…

How I can convert this, to display the output in BAR?
It is possible to do this with shelly scripting or an HASS helper?

Many Thanks.

2

Template: something like

{ if is_state == 25,0% | 1,3 BAR } … figure out the correct syntax, by reading about ha- template integration, and examples here in the forum