Energy Converter

Enter Energy Value:

From Unit:

Joule (J)Kilojoule (kJ)Calorie (cal)Kilocalorie (kcal)Watt-hour (Wh)Kilowatt-hour (kWh)Electronvolt (eV)British Thermal Unit (BTU)Foot-pound (ft·lb)

To Unit:

Joule (J)Kilojoule (kJ)Calorie (cal)Kilocalorie (kcal)Watt-hour (Wh)Kilowatt-hour (kWh)Electronvolt (eV)British Thermal Unit (BTU)Foot-pound (ft·lb)

Conversion Options

Show All UnitsDisplay conversion in all energy units

Conversion Result

All Energy Units:

Joule (J):0

Kilojoule (kJ):0

Calorie (cal):0

Kilocalorie (kcal):0

Watt-hour (Wh):0

Kilowatt-hour (kWh):0

Electronvolt (eV):0

British Thermal Unit (BTU):0

Foot-pound (ft·lb):0

Energy Information:

Enter an energy value to see information

Note: This tool converts between different energy units.

About This Energy Converter

This tool converts between different energy measurement units including joules, calories, watt-hours, and more. Energy conversion is essential in physics, engineering, and everyday life for comparing different forms of energy.

How to Use This Converter

Step-by-Step Guide:

1. Step 1: Enter the energy value you want to convert
2. Step 2: Select the unit you're converting from
3. Step 3: Select the unit you want to convert to
4. Step 4: Click "Convert Energy" to see results
5. Step 5: View additional energy information
6. Step 6: Copy or clear results as needed

Conversion Formulas:

• Joules to Calories: 1 cal = 4.184 J
• Joules to Watt-hours: 1 Wh = 3600 J
• Joules to Electronvolts: 1 eV = 1.60218 × 10⁻¹⁹ J
• Joules to BTUs: 1 BTU = 1055.06 J
• Joules to Foot-pounds: 1 ft·lb = 1.35582 J
• Calories to Joules: 1 J = 0.239006 cal
• Kilowatt-hours to Joules: 1 kWh = 3.6 × 10⁶ J

Example Conversions:

Input: 1000 J to calories
Output: 239.006 cal

Input: 1 kWh to joules
Output: 3,600,000 J

Input: 5000 BTU to kWh
Output: 1.46507 kWh