1. What is kWh?

A kilowatt-hour (kWh) is a unit of energy that represents the amount of electricity consumed over time. It's commonly used by utility companies to measure and bill for electricity usage.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( kWh \) — Kilowatt-hours (energy)
• \( P \) — Power in watts (W)
• \( h \) — Time in hours (h)
• 1000 — Conversion factor from watts to kilowatts

Explanation: The formula converts power consumption over time from watts to the more standard kilowatt-hour unit used for billing.

3. Importance of Energy Calculation

Details: Understanding energy consumption helps in estimating electricity costs, comparing appliance efficiency, and managing power usage.

4. Using the Calculator

Tips: Enter power in watts and time in hours. Both values must be positive numbers. The result shows energy consumption in kilowatt-hours.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between kW and kWh?
A: kW (kilowatt) measures power (rate of energy use), while kWh (kilowatt-hour) measures energy (power × time).

Q2: How much does 1 kWh cost?
A: Costs vary by location and provider, typically $0.10-$0.30 per kWh in the US.

Q3: How many kWh does a typical home use?
A: Average US household uses about 900 kWh per month.

Q4: Can I calculate cost from kWh?
A: Yes, multiply kWh by your electricity rate (cost per kWh).

Q5: Why divide by 1000?
A: To convert watts (W) to kilowatts (kW) since 1 kW = 1000 W.