Display two decimal places in the dashboard

[fireplex]

A really noddy question here but I’ve tried a few things and cannot figure it out.

I want to display how much electricity I have exported today in pounds/pence with 2 decimal places, but I cannot figure it out, the entity card typically only displays a single decimal place unless the value is something like 2.35, eg:

The above is from a template sensor:

  - name: "Exported Electricity Today"
    unit_of_measurement: GBP/kWh
    state_class: total
    device_class: monetary
    state: "{{ '{:.2f}'.format(
states('sensor.octopus_electricity_export_day_compensation') | float + 
states('sensor.octopus_electricity_export_flux_compensation') | float +
states('sensor.octopus_electricity_export_peak_compensation') | float) }}"

The above template works fine in the Developers Tool template tester but not on the dashboard. I thought defining device_class: monetary would help but it didn’t

Any ideas please?

[Holdestmade]

Not sure it’s possible as the frontend removes trailing zeros, looking at this thread:

Using round(2) sometimes results in one decimal when last number is 0

Hi, I created a template to convert my current net energy to kW for my dashboard. I use round(2) to round off to two decimals, however this unfortunately does not always result in two decimals. I’m using the following template: - platform: template sensors: p1_net_electricity_point_kw: friendly_name: "P1 Net electricity point kW" unit_of_measurement: "kW" value_template: "{{ (states('sensor.p1_net_electricity_point') | float * 0.001) | round(2) }}" This w…

[Troon]

You could create a template sensor for display only, forcing the state to a string by adding the units on the end. Bit ugly, but it’s the best you can do:

template:
  - sensor:
      - name: Exported electricity as string
        state: "{{ '{:.2f}'.format(states('sensor.exported_electricity_today')|float(0)) ~ ' GBP/kWh' }}"

or:

        state: "{{ '£' ~ '{:.2f}'.format(states('sensor.exported_electricity_today')|float(0)) ~ ' per kWh' }}"

[fireplex]

Thanks all, interesting, I will try those options

[fireplex]

Hmm, can’t get your example to work.

This is fine:

  - name: "Exported Electricity Today"
    unit_of_measurement: GBP/kWh
    state_class: total_increasing
    state: "{{ '{:.2f}'.format(
      states('sensor.octopus_electricity_export_day_compensation') | float + 
      states('sensor.octopus_electricity_export_flux_compensation') | float +
      states('sensor.octopus_electricity_export_peak_compensation') | float) }}"

But when I then try this:

  - name: "Testing String"
    state: "{{ 'Testing ' ~ '{:.2f}'.format(states('sensor.exported_electricity_today')) ~ 'test' }}"

in the logs I get

Logger: homeassistant.helpers.template_entity
Source: helpers/template_entity.py:408
First occurred: 15:40:30 (1 occurrences)
Last logged: 15:40:30

TemplateError('ValueError: Unknown format code 'f' for object of type 'str'') while processing template 'Template<template=({{ 'Testing ' ~ '{:.2f}'.format(states('sensor.exported_electricity_today')) ~ 'test' }}) renders=4>' for attribute '_attr_native_value' in entity 'sensor.testing_string'

I think that means it believes my sensor.exported_electricity_today is a string not an integer hence can’t run the format on it?

[Troon]

@fireplex

I think that means it believes my sensor.exported_electricity_today is a string not an integer hence can’t run the format on it?

Correct-ish, should have a |float on the end as per your original. Fixed in my post above.

[fireplex]

@Troon

Correct-ish, should have a |float on the end as per your original. Fixed in my post above.

Brill, thanks for the assistance, much appreciated.

[fireplex]

Just found another, maybe better way of doing this.

Define the template sensor with a unique_id, eg:

 - name: "Imported Electricity Today"
    unit_of_measurement: GBP
    state_class: total_increasing
    state: "{{ states('sensor.octopus_electricity_day_cost') | float + 
      states('sensor.octopus_electricity_flux_cost') | float +
      states('sensor.octopus_electricity_peak_cost') | float }}"    
    unique_id: imported_today

Then in the dashboard select the entity, click the cog icon and you can choose the display precision, eg:

[Troon]

That will not show trailing zeros — it’ll show 4.2 not 4.20.

I stand corrected

[fireplex]

[Ordiproxi (sylvain vilain)]

Merci !!!