1. What is Energy from Power Calculator?

Definition: This calculator computes the energy consumed or produced based on power and time using the fundamental energy formula.

Purpose: It helps in electrical engineering, physics calculations, and energy consumption estimation for appliances and systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( E \) — Energy (watt-hours or joules)
• \( P \) — Power (watts)
• \( t \) — Time (hours)

Explanation: Energy is simply the product of power and the duration for which that power is applied.

3. Importance of Energy Calculation

Details: Accurate energy calculations are essential for electrical system design, energy billing, efficiency analysis, and battery capacity planning.

4. Using the Calculator

Tips: Enter the power in watts and time in hours. For seconds instead of hours, the result will be in joules (1 watt-second = 1 joule).

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between watts and watt-hours?
A: Watts measure power (rate of energy use), while watt-hours measure energy (power × time).

Q2: How do I convert watt-hours to joules?
A: Multiply watt-hours by 3600 (1 Wh = 3600 J).

Q3: Can I use this for DC and AC power?
A: For DC or pure resistive AC loads, yes. For reactive AC loads, use apparent power (VA).

Q4: How does this relate to electricity bills?
A: Utilities typically charge by kilowatt-hours (kWh), which is 1000 watt-hours.

Q5: What if my time is in minutes or seconds?
A: Convert to hours first (divide minutes by 60, seconds by 3600) or use appropriate units.