Energy Converter Online

Energy Converter Online

Convert energy values instantly using our free Energy Converter Online. Switch between Watt-hour (Wh), Milliwatt-hour (mWh), Kilowatt-hour (kWh), Megawatt-hour (MWh), Gigawatt-hour (GWh), Joule (J), and Kilojoule (kJ) with ease. Ideal for engineers, students, researchers, and professionals working in energy evaluation and billing.

Supported Energy Units

• Watt-hour (Wh)
• Milliwatt-hour (mWh) – 1 Wh = 1000 mWh
• Kilowatt-hour (kWh) – 1 kWh = 1,000 Wh
• Megawatt-hour (MWh) – 1 MWh = 1,000 kWh
• Gigawatt-hour (GWh) – 1 GWh = 1,000 MWh
• Joule (J) – 1 Wh = 3600 J
• Kilojoule (kJ) – 1 kJ = 1000 J

How to Use the Tool

1. Enter the numeric energy value (e.g., 50).
2. Select the unit to convert from (e.g., Wh).
3. Select the unit to convert to (e.g., kJ).
4. Click Calculate.
5. The tool displays all equivalent values instantly.

Example Conversion

Input Value: 50 Wh
Convert From: Watt‑hour (Wh)

Output:
- Wh to Wh: 50
- Wh to mWh: 50,000
- Wh to kWh: 0.05
- Wh to MWh: 0.00005
- Wh to GWh: 5×10⁻⁸
- Wh to J: 180,000
- Wh to kJ: 180
  

Energy Conversion Table

Key Uses and Applications

• Calculating electricity bills using kWh usage
• Estimating battery energy in Wh, kJ, or Wh
• Comparing industrial energy consumption
• Converting large-scale energy output (MWh, GWh)
• Educational purposes — physics, chemistry, engineering

Conversion Formulas

• Wh → J: multiply by 3600
• J → Wh: divide by 3600
• Wh → kWh: divide by 1000
• kWh → Wh: multiply by 1000
• Wh → mWh: multiply by 1000
• Wh → MWh: divide by 1 000 000
• Wh → GWh: divide by 1 000 000 000

Common FAQs

How to convert energy to Joules? 

Multiply Watt‑hours by 3600 (e.g., 1 Wh = 3600 J). 

What is 1 kWh in Wh?

1 kWh = 1000 Wh. 

What is the difference between MWh and GWh?

MWh = 1,000 kWh; GWh = 1,000 MWh = 1,000,000 kWh.

Why convert to Joules? 

Joules are the SI unit; useful in scientific and thermodynamic calculations.

Conclusion

This Energy Converter Online tool simplifies complex energy unit conversions for you instantly and accurately. Whether you're analyzing your household electricity usage or researching large-scale energy production, it provides reliable results. Bookmark and use this as your go-to energy unit converter.