Never mind, I figured out the constant. It’s 95*1.25 = 118.75
For anyone else who needs a calculation similar to this here is the final template code:
- platform: template
sensors:
oil_status:
friendly_name: “Oil Status”
unit_of_measurement: “%”
value_template: “{{ (118.75 - states(‘sensor.sonoff_oil_level’)|float * 1.25) |round(1) }}”
Thanks for your help.