Power accounting
Energy Measurement Calculator
Compute a basic energy balance for electrical demonstrations and see when meter choice, power factor, storage, or uncertainty can erase a claimed surplus.
Use RMS readings and real power when possible. The calculator never uploads values.
Key facts
- Real AC power uses RMS voltage, RMS current, and power factor, not volts times amps alone.
- Stored energy spent during a run is counted as input before any output/input ratio is interpreted.
- Surplus inside the uncertainty screen is inconclusive, even when the raw ratio is above one.
FAQ
Why does power factor matter?
For AC or pulsed systems, apparent power from volts times amps can exceed true real power. Power factor accounts for that difference.
Why include stored energy?
A device can appear over-unity while spending a battery, capacitor, flywheel, thermal mass, pressure vessel, or chemical state.
Can this replace a calibrated lab test?
No. It is a planning calculator. Use calibrated instruments and a written uncertainty budget for real claims.