Add a precision option for the input_number helper

Feature Requests
1

The input_number helper does not have an option to set the precision.

When you show an input_number helper value in a tile card for example, it will always round itself automatically.

For instance, if the value of an input_number is 21.5, it will show 21.5 in a tile card.
But, if you want to show that 21.5 as a currency value in a tile card, you would typically want to show 21.50 in the tile card.

As far as I know, this is not possible at the moment. It would be great if the input_number helper has a precision option just like the “combine the state of several sensors” helper for instance.

2

I wanted to set up a central price helper to use in the Energy Dashboard (for example for grid consumption costs).

I noticed that when you create an input number helper via the UI in Home Assistant (2025.4.4), you can only set min and max values, but there’s no option for step size or unit of measurement.

Since I wanted precise values (e.g., 0.001 € steps) and a proper unit (“EUR/kWh”), I had to do it via YAML instead.