Energy Converter
Convert Joules, calories, kilowatt-hours, and BTU with our energy converter. Energy conversions are essential for understanding nutrition labels (calories/kilocalories), electricity bills (kWh), and heating systems (BTU). Note that food 'Calories' are actually kilocalories (kcal).
Popular:
0.001kJ
Formula:1 J = 0.001 kJ
Quick Reference
- 1 food Calorie = 1 kcal = 4,184 J
- 1 kWh = 3,600,000 J
- 1 BTU ≈ 1,055 J
How to Use This Tool
- Select your source energy unit (Joules, calories, kWh, etc.)
- Enter the energy value to convert
- Choose your target energy unit
- Get instant conversion results
- Useful for nutrition, utilities, and science
Common Uses
- •Understanding food calories and nutrition labels
- •Calculating electricity costs (kWh)
- •Heating and cooling system comparisons (BTU)
- •Physics and chemistry calculations
- •Comparing energy efficiency ratings