Energy Conversion
Instantly convert energy values between British Thermal Units (BTU), joules, kilowatt-hours, therms, and both nutritional and thermochemical calories. Select a source unit, enter a value, and see the equivalent in your target unit.
Energy Conversion
Formula
How many joules are in one BTU?
1 BTU = 1055.05585262 J
How many BTU's are in one joule?
1 Joule = 0.00094781712 BTU
Introduction
How is Energy Converted?
Energy conversion is the transformation of energy from one form into another to make it useful for human activity. While energy comes in many forms—including kinetic, potential, gravitational, and electrical—it follows the Law of Conservation of Energy: energy can be transferred or transformed, but the total amount always remains the same.
Examples of Energy Conversions
- The Sun: Converts Nuclear Energy into Heat and Light Energy.
- Our Bodies: Convert Chemical Energy (from food) into Mechanical Energy (for movement).
- An Electric Fan: Converts Electrical Energy into Kinetic Energy.
Common Conversion Types
- Light Thermal: Sunlight warming a surface.
- Electrical Mechanical: Motors powering machinery.
- Chemical Electrical: Batteries powering devices.
- Thermal Mechanical: Steam turbines generating power.
Units of Energy
Different industries use different units to measure energy. Below are the most common standards:
| Symbol | Unit Name | Description |
|---|---|---|
| J | Joule | The standard SI unit of energy. |
| cal | Calorie | Often used in chemistry and nutrition. |
| Wh | Watt-hour | Commonly used for electricity consumption. |
| eV | Electron volt | Used in atomic and particle physics. |
| BTU | British Thermal Unit | Standard for heating and cooling systems. |
| kgce | kg Coal Equivalent | Energy released by burning 1 kg of coal. |
| kgoe | kg Oil Equivalent | Energy released by burning 1 kg of crude oil. |
| m³ Gas | Cubic Meter Gas | Energy equivalent of natural gas volume. |
| kpm | Kilopondmeter | Obsolete gravitational metric unit. |
| erg | Erg | CGS unit equal to joules. |
FAQ
What is conversion of energy give two examples?
Energy conversion is the process of changing energy from one form into another. For example, gasoline's chemical energy, combined with electrical energy from a battery, produces mechanical (kinetic) energy to move a car. Similarly, electricity supplied to a television is converted into light and sound.
How do you calculate energy conversions?
To convert between energy units, use the joule as the base. Multiply the value by the conversion factor for the source unit to obtain joules, then divide by the conversion factor for the target unit. For example, to convert from unit A to unit B, first convert A to joules using A's factor, then divide by B's factor to get the result in B.
How is energy converted into temperature?
Divide the heat energy (in joules) by the mass of the substance (in grams), then divide that result by the substance's specific heat capacity. For instance, 4,000 joules provided to 500 grams of water gives 4,000 ÷ 500 = 8; dividing 8 by the specific heat capacity yields the temperature change.
How do you convert MMBtu to m3?
One MMBtu equals approximately 28.263682 cubic meters of natural gas at a defined temperature and pressure.
How do you convert AU to joules?
One atomic unit of energy (au) is equal to 4.359744 × 10⁻¹⁸ joules. To convert a value in au to joules, multiply it by 4.359744 × 10⁻¹⁸.
Is kJ smaller than J?
No, a kilojoule (kJ) is larger than a joule (J). One kilojoule equals 1,000 joules, and one megajoule (MJ) equals 1,000,000 joules. A watt, by contrast, is a unit of power, measuring energy per unit time.
How many joules are in a mole?
A mole contains approximately 6.022 × 10²³ particles. To find the energy per particle in joules, divide one joule by Avogadro's number: 1 J/mol ÷ 6.022 × 10²³ mol⁻¹ ≈ 1.66054 × 10⁻²⁴ J per particle.
How much energy is a Kilojoule?
A kilojoule (kJ) is a unit of energy, just as a kilometre measures distance. In food energy, Calories (Cal) are also used. One kilojoule is approximately 0.2 Calories.
What is the difference between kJ and J?
One joule (J) equals 0.001 kilojoules (kJ). To convert joules to kilojoules, multiply by 0.001 or divide by 1000. For instance, 100 J divided by 1000 equals 0.1 kJ.
What is a unit of energy called?
The standard unit of energy is the joule (J), defined as the work done by a force of one newton acting over one meter. Another common unit is the kilowatt-hour (kWh), which is the energy used by a one-kilowatt device running for one hour. Energy equals power multiplied by time (E = P × t).
Related Tools
Resistor Color Code Calculator
106
Glofell’s Resistor Color Code Calculator decodes 4-band, 5-band, and 6-band resistors. Select each band to identify resistance, tolerance, and power rating for circuit work, repairs, or lab sorting.
Ohms Law Calculator
94
Glofell’s Ohm’s Law Calculator helps engineers and students quickly solve for voltage, current, resistance, and power. Provide any two known values to calculate the remaining parameters, making it a practical reference for circuit design, troubleshooting, and electronics learning.
Op-Amp Voltage and Gain Calculator
86
Calculate output voltage together with inverting and non-inverting gain for operational-amplifier circuits. Enter V1, V2, Vp, Vn, and resistor values R1 through R4 to obtain accurate results for circuit design, troubleshooting, and op-amp learning.
Inverting Op-Amp Resistor Calculator
87
Analyze an inverting operational-amplifier circuit by entering the desired gain, output voltage (Vout), R1 resistance, and input voltages V1, V2, Vp, and Vn. The calculator automatically determines the required R2, R3, and R4 resistor values, helping you design and verify inverting op-amp configurations.
