Convert Energy

This energy converter is a powerful tool that allows you to easily convert energy units, specifically joules, to other units such as calories, kilowatt-hours, and British thermal units. This calculator is easy to use and can help anyone who needs to understand energy measurements for scientific experiments or industrial processes.

Table of Contents

• Conversion Formulas
• Conversion Examples
• Frequently Asked Questions

Conversion Formulas

Below are the most common conversions from Joules to other energy units, along with their respective formulas:

• Joules to Kilowatt-hours (kWh):
  1 Joule = 0.0000002777778 kWh
  Formula: kWh = Joules × 0.0000002777778
• Joules to British Thermal Units (BTU):
  1 Joule = 0.000947817 BTU
  Formula: BTU = Joules × 0.000947817
• Joules to Calories (cal):
  1 Joule = 0.239005736 cal
  Formula: cal = Joules × 0.239005736
• Joules to Watt-hours (Wh):
  1 Joule = 0.0002777778 Wh
  Formula: Wh = Joules × 0.0002777778

Conversion Examples

Below are practical examples of how to convert different energy units, along with their respective calculations:

1. From Joules to Kilowatt-hours (kWh):
   Conversion: 50,000 J = 0.01388889 kWh
   Formula: 50,000 × 0.0002777778 = 0.01388889 kWh
2. From Joules to British Thermal Units (BTU):
   Conversion: 4,500 J = 4.2651765 BTU
   Formula: 4,500 × 0.000947817 = 4.2651765 BTU
3. From Joules to Calories (cal):
   Conversion: 7,000 J = 1,673.040152 cal
   Formula: 7,000 × 0.239005736 = 1,673.040152 cal
4. From Joules to Watt-hours (Wh):
   Conversion: 8,500 J = 2.3611113 Wh
   Formula: 8,500 × 0.0002777778 = 2.3611113 Wh

Frequently Asked Questions

How do you convert joules (J) to kilojoules (kJ)?

To convert joules to kilojoules, divide the value by 1,000.
Formula: kilojoules = joules ÷ 1,000
Example: 5,000 J = 5,000 ÷ 1,000 = 5 kJ

How do I convert joules to calories (cal)?

Multiply joules by 0.239005736.
Formula: calories = joules × 0.239005736
Example: 100 J × 0.239005736 ≈ 23.90 cal

What is the formula to convert joules to kilowatt-hours (kWh)?

Divide joules by 3,600,000.
Formula: kWh = joules ÷ 3,600,000
Example: 720,000 J ÷ 3,600,000 = 0.2 kWh

How many BTU are there in one joule?

1 joule is approximately equal to 0.000947817 BTU.
Formula: BTU = joules × 0.000947817
Example: 2,000 J × 0.000947817 = 1.8956 BTU

How do you convert kilojoules to joules?

Multiply kilojoules by 1,000.
Formula: joules = kilojoules × 1,000
Example: 3.5 kJ × 1,000 = 3,500 J

What other energy units can be converted from joules?

Joules can be converted to several energy units:

• Kilojoules (kJ)
• Calories (cal)
• Kilocalories (kcal)
• Kilowatt-hours (kWh)
• BTU
• Electronvolts (eV)
• Ergs