1. What is Watt-hour to kWh Conversion?

The conversion between watt-hours (Wh) and kilowatt-hours (kWh) is a fundamental calculation in electrical energy measurement. It's used to express energy consumption in more practical units for billing and comparison purposes.

2. How Does the Conversion Work?

The conversion formula is simple:

Where:

• \( Wh \) — Watt-hours, a unit of energy equal to one watt of power expended for one hour
• \( kWh \) — Kilowatt-hours, equal to 1000 watt-hours

Explanation: Since "kilo" means 1000, converting from watt-hours to kilowatt-hours simply requires dividing by 1000.

3. Practical Applications

Details: This conversion is essential for understanding electricity bills (typically measured in kWh), comparing energy usage of appliances, and calculating energy costs.

4. Using the Calculator

Tips: Enter the watt-hour value you want to convert. The calculator will automatically compute the equivalent kilowatt-hour value. Values must be non-negative.

5. Frequently Asked Questions (FAQ)

Q1: Why convert Wh to kWh?
A: kWh is the standard unit for electricity billing and makes large energy values easier to work with (1000 Wh = 1 kWh).

Q2: How many kWh is 5000 Wh?
A: 5000 Wh = 5 kWh (5000 ÷ 1000 = 5).

Q3: Is a watt-hour the same as a watt?
A: No, watts measure power (rate of energy use), while watt-hours measure energy (power × time).

Q4: How does this relate to battery capacity?
A: Battery capacity is often measured in Wh or kWh (e.g., a 5000 mAh phone battery at 3.7V ≈ 18.5 Wh).

Q5: What's the difference between kW and kWh?
A: kW is power (how fast energy is used), kWh is energy (total amount used over time).