E=mc² em kWh
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
kWh
About this calculator
The E=mc² in kWh calculator is an online tool that allows you to convert the energy stored in a mass into kilowatt-hours (kWh). This tool is based on Einstein's famous equation, E=mc², which relates energy (E) to mass (m) and the speed of light (c).
The formula behind the calculator is simple: just enter the mass in kilograms and the speed of light in meters per second, and the calculator will do the calculation to obtain the energy in kilowatt-hours. This is useful for understanding the equivalence between mass and energy in different physical contexts.
The calculator is useful in real cases, such as calculating the energy released by the combustion of fossil fuels or the energy stored in a battery. In addition, it is a valuable educational tool for physics students who seek to better understand the relationship between mass and energy.
When using the calculator, it is important to be careful with the units of measurement and ensure that the values entered are accurate. Furthermore, it is essential to understand that the equation E=mc² is a simplification of Einstein's special relativity theory and does not apply to all physical contexts.
Frequently asked questions
What is the equation E=mc²?
The equation E=mc² is a formula that relates energy (E) to mass (m) and the speed of light (c). It was developed by Albert Einstein and is one of the main equations of the special relativity theory.
How does the E=mc² in kWh calculator work?
The calculator works by entering the mass in kilograms and the speed of light in meters per second. Then, it performs the calculation to obtain the energy in kilowatt-hours.
What are the use cases for the calculator?
The calculator is useful for calculating the energy released by the combustion of fossil fuels, the energy stored in a battery, among other cases.
Why is it important to be careful with the units of measurement?
It is important to be careful with the units of measurement to ensure that the values entered are accurate and the results are reliable.
Does the equation E=mc² apply to all physical contexts?
No, the equation E=mc² is a simplification of Einstein's special relativity theory and does not apply to all physical contexts.