Virtual power sensors
Estimate live wattage from entity state, brightness, color temperature, fan speed, or custom strategies.
Home Assistant virtual power sensors
Energy insight without smart plugs everywhere.
Powercalc estimates power, energy, cost, and utility meter data for lights, fans, media players, and other devices that cannot measure consumption themselves.
Use devices you already own
Estimate consumption for lights, fans, switches, media players, and more without adding meters everywhere.
Start from measured profiles
Match supported devices from the shared library, then fine-tune with standby power and custom strategies.
Feed Home Assistant Energy
Create power, energy, utility meter, group, and cost sensors for dashboards and automations.
Realtime estimates
Built for the devices Home Assistant already knows about.
Add realistic consumption data where physical meters are expensive, impractical, or simply missing.
Energy and utility meters
Create energy totals and daily, weekly, monthly, or yearly utility meters for dashboards and automations.
Cost tracking
Translate estimated energy use into spending so rooms, groups, and devices become easier to compare.
Sustainability
Use energy insight to lower your footprint.
Powercalc makes power patterns visible across your home, helping you choose smarter devices, reduce waste, and avoid extra hardware where virtual sensors are accurate enough.
- 1 Reduce unnecessary plugsUse virtual sensors where estimates are good enough, and reserve physical meters for devices that need exact measurements.
- 2 Understand power patternsStandby power, room totals, and utility meters make recurring waste easier to find, compare, and automate away.
- 3 Choose efficient devicesThe profile library can support purchasing decisions by comparing devices on measured or estimated consumption.
Next steps
Check whether your device is already supported, add Powercalc to Home Assistant, and use the documentation to refine sensors for standby power, grouped rooms, tariffs, and custom strategies.