⚡ Turn any device into an energy monitor, no smart plug required
PowerCalc estimates energy consumption for devices that can't measure it themselves, like lights, fans and media players, with no extra hardware. Instead of measuring power directly, it accurately estimates consumption using smart models based on real measurements, all inside Home Assistant.
On top of power and energy sensors, PowerCalc also creates cost sensors to track spending, utility meters to break usage down by day, week or month, and group sensors to combine devices, rooms or your whole home into a single total.
See it in action
Why use PowerCalc?
- 💰 Save money - no need to buy smart plugs for every device
- 🔍 Full visibility - track energy usage across your entire home
- ⚡ Accurate estimates - based on real device measurements
- 🔌 Works out of the box - huge built-in profile library
- 🧠 Advanced modeling - brightness, color, fan speed, and more
How it works
PowerCalc creates virtual power sensors in Home Assistant.
For example:
- 💡 Lights → power based on brightness, color, temperature
- 🌀 Fans → power based on speed
- 📺 Other devices → configurable strategies or measured profiles
You get realistic energy data — without physically measuring every device.
Get started
🌍 Community & contributions
PowerCalc is powered by a growing community:
See CONTRIBUTING.md to get started, and the Code of Conduct for how we work together.
⭐ Support the project
If PowerCalc helped you:
🙌 Powered by
