Most Common Conversion Factors
| J | kJ | Wh | kcal | |
|---|---|---|---|---|
| 1 J | 1 | 0.001 | 2.778 x 10-4 | 2.388 x 10-4 |
| 1 kJ | 1000 | 1 | 0.277778 | 0.238846 |
| 1 Wh | 3600 | 3.6 | 1 | 0.860421 |
| 1 kcal | 4186.8 | 4.1868 | 1.163 | 1 |
Energy Converter FAQ
What is an energy converter?
An energy converter converts energy units such as J, kJ, cal, kcal, kWh, and BTU. It is useful for physics, nutrition, HVAC, electricity use, heating, and energy cost calculations.
How do I convert joules to calories?
Enter a value, choose J as the source unit, and choose cal as the target unit. This is useful when comparing physics energy values with heat or nutrition-related energy units.
How do I convert kWh to BTU?
Enter the value, select kWh as the source unit, and select BTU as the target unit. This is commonly used for electricity, heating, cooling, HVAC, and energy consumption comparisons.
What is the difference between J, cal, kcal, kWh, and BTU?J is the SI unit of energy, cal and kcal are often used for heat and food energy, kWh is commonly used for electricity consumption, and BTU is often used for heating, cooling, and HVAC systems.
Is kcal the same as Calories on food labels?
Yes. In nutrition, a food Calorie with a capital C usually means 1 kcal, or 1000 cal. This is different from a small calorie used in some scientific contexts.
When should I use an energy converter?
Use an energy converter when solving physics problems, comparing electricity use, converting heating or cooling values, checking food energy, estimating battery capacity, or translating energy data between different unit systems.
Can I use this converter for electricity and energy cost calculations?
Yes. This energy converter is useful for converting values such as kWh, J, and BTU when comparing appliance energy use, electricity consumption, HVAC output, and energy costs.
