Convert between Joules, Kilowatt-hours (kWh), BTU, Calories, Therms, Electronvolts, Foot-pounds, and over 35 energy units with high precision. Ideal for engineering, electricity, physics, HVAC, fuel analysis, and scientific calculations.
Energy is the ability to perform work or produce heat. It is measured using various units depending on the application. Engineers commonly use Joules, electricians use Kilowatt-hours (kWh), HVAC professionals use BTU, nutrition labels use Calories, and physicists often work with Electronvolts (eV). This converter instantly converts between all supported energy units using internationally accepted conversion factors.
Enter an energy value to begin conversion.
| Energy Unit | Symbol | Converted Value |
|---|
Enter one energy value per line. Every value will be converted instantly into the selected energy unit.
Energy (J) = Input Energy × Conversion Factor
Target Energy = Energy (J) ÷ Target Unit Factor
Converted Energy = (Input × From Factor) ÷ To Factor
Convert
1 Kilowatt-hour
to Joules
1 × 3,600,000
=
3,600,000 J
| Conversion | Equivalent |
|---|---|
| 1 Kilojoule | 1,000 J |
| 1 Megajoule | 1,000,000 J |
| 1 Watt-hour | 3,600 J |
| 1 Kilowatt-hour | 3,600,000 J |
| 1 BTU (IT) | 1,055.056 J |
| 1 Therm | 105,505,585 J |
| 1 Calorie | 4.184 J |
| 1 Kilocalorie | 4,184 J |
| 1 Foot-pound | 1.355818 J |
| 1 Erg | 0.0000001 J |
| 1 Electronvolt | 1.602176634 × 10⁻¹⁹ J |
| 1 Ton TNT | 4.184 × 10⁹ J |
Energy is the capacity to perform work or transfer heat. It exists in many forms including mechanical, electrical, thermal, chemical, nuclear, and radiant energy. Different industries use different units depending on international standards, engineering practices, and scientific applications. This energy converter supports more than 35 internationally recognized units for accurate conversions.
| Category | Popular Units | Typical Applications |
|---|---|---|
| SI | J, kJ, MJ, GJ | Engineering, Science |
| Electrical | Wh, kWh, MWh | Electricity Consumption |
| Thermal | BTU, Therm, Calorie | Heating & Cooling |
| Mechanical | Foot-pound, hp·h | Machines & Engines |
| Scientific | eV, MeV, GeV | Physics Research |
| Explosive | Ton TNT | Energy Equivalence |
Used to convert electrical energy between Joules, Watt-hours, and Kilowatt-hours for power calculations and utility billing.
Industrial equipment and machinery often require energy calculations in Joules, BTU, and Horsepower-hours.
Heating and cooling capacities are commonly measured using BTU, Therms, and Kilowatt-hours.
Food energy is typically expressed in Calories (kcal), while scientific nutrition uses kilojoules.
Laboratories use Electronvolts, Joules, and Ergs in atomic, nuclear, and particle physics experiments.
Solar, wind, and hydroelectric systems commonly measure production in MWh and GWh.
1 × 3,600,000 = 3,600,000 Joules
1000 × 4.184 = 4184 kJ
5000 BTU ≈ 1.465 kWh
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