# Number/ Temperature estimation

Hey all

I have a sensor that reads the pool temperature. The rising of the temperature is pretty constant, give or take a few deviations. So I know

• current temperature
• start time of heating
• heating operation (on, off)
• Target temperature.

Is is somehow possible to guesstimate the rough exact guess (cough) of when the pool (might have) reached its target temperature?

Thanks guys

If you consider a fixed rate at which the pool gets heated then this is a pretty easy formula, or? But what do you want to do with thisâ€¦ want to know when to switch off the pool heating? Then you could use the pool temp as wellâ€¦for now it seems you are making it complex but maybe I am missing the point as to what you want to achieve

Easy: You turn the pool on, and when the kids ask you, you can say â€śin 2 hoursâ€ť
Itâ€™s more of a â€śwhen is the pool readyâ€ť indicator for humans.

The automations are already there, with outside temperature, excess energy, rain probability et all.

soâ€¦ example:
target: 28
current: 23
rate: 1.2 /h
ready in hours: (target - current) / rate
this is not that complex with a template sensor
you can also add the hours to the current time so indicate both time and how long
â€¦ seeing you already have automations, I would guess you know this â€¦ otherwiseâ€¦ not sure if my view is too simple