⚡ Physics & Thermodynamics
Energy & Work Unit Converter
Convert Joules, kilowatt-hours, food calories, BTU, and mechanical work units with precision.
Energy Benchmarks:
1 kWh to Joules
2,000 kcal Daily Food Diet
1 BTU to Joules
1,000 J to Foot-Pounds
Conversion Result
3,600,000 Joules
Live Multi-Unit Comparison:
Joules (J)
-
Kilowatt-Hours (kWh)
-
Food Calories (kcal)
-
BTU
-
Thermodynamics & Energy Conservation Principles
In physics, energy is the quantitative property transferred to a body to perform work or produce heat. Under the First Law of Thermodynamics (Conservation of Energy), energy cannot be created or destroyed, only transformed between thermal, mechanical, electrical, chemical, and nuclear forms.
Key Conversion Factors
| Energy Unit | Symbol | Equivalence in Joules ($J$) | Typical Application |
|---|---|---|---|
| Joule (SI Unit) | J | 1 J ($1 \text{ N}\cdot\text{m} = 1\text{ kg}\cdot\text{m}^2/\text{s}^2$) | Scientific and mechanical calculations. |
| Kilowatt-Hour | kWh | 3,600,000 J (3.6 MJ) | Electric grid utility billing and EV battery storage. |
| Food Calorie | kcal / Cal | 4,184 J (4.184 kJ) | Human nutrition and metabolic expenditure. |
| British Thermal Unit | BTU | 1,055.06 J | HVAC heating, ventilation, and air conditioning cooling capacity. |
| Electronvolt | eV | $1.602176634 \times 10^{-19}$ J | Quantum physics, photon energy, and semiconductor bandgaps. |