Energy Conversion: 1 kWh = 3,600,000 joules | Essential for electricity and energy calculations
Accurate conversion between joules (J) and kilowatt-hours (kWh) for energy calculations, electricity usage, and power measurement. Essential for understanding energy consumption and electrical power.
Conversion Factor
1 kWh = 3,600,000 joules (J) | 1 joule = 2.77778 × 10⁻⁷ kWh
Precision: 2 Decimal Places | Formula: kWh = J ÷ 3600000
Understanding these essential energy units for electricity, power consumption, and energy calculations.
Joule to kWh Conversion
1 kWh = 3,600,000 joules (J)
1 joule = 2.77778 × 10⁻⁷ kWh
kWh = Joules ÷ 3,600,000
Joules = kWh × 3,600,000
Convert 3,600,000 joules to kWh:
kWh = J ÷ 3,600,000
kWh = 3,600,000 ÷ 3,600,000
kWh = 1 (with 0 decimal places)
Convert 2.5 kWh to joules:
J = kWh × 3,600,000
J = 2.5 × 3,600,000
J = 9,000,000 (with 0 decimal place)
Note: These conversions are standard for electrical energy measurements
The SI unit of energy, work, or heat. One joule is the energy transferred when a force of one newton acts through a distance of one meter.
Equivalents:
Note: Joule is the standard SI unit for energy measurement
A unit of energy equal to one kilowatt (1000 watts) of power expended for one hour of time. It's the standard unit for measuring electricity usage.
Equivalents:
Note: kWh is the standard billing unit for electricity consumption
| Joules (J) | Kilojoules (kJ) | Watt-hours (Wh) | kWh | Megajoules (MJ) |
|---|---|---|---|---|
| 1 J | 0.001 kJ | 0.000278 Wh | 2.78e-7 kWh | 1e-6 MJ |
| 1,000 J | 1 kJ | 0.278 Wh | 0.000278 kWh | 0.001 MJ |
| 3,600 J | 3.6 kJ | 1 Wh | 0.001 kWh | 0.0036 MJ |
| 1,000,000 J | 1,000 kJ | 277.78 Wh | 0.2778 kWh | 1 MJ |
| 3,600,000 J | 3,600 kJ | 1,000 Wh | 1 kWh | 3.6 MJ |
| 10,000,000 J | 10,000 kJ | 2,777.78 Wh | 2.7778 kWh | 10 MJ |
Common questions about joules, kilowatt-hours, and energy conversions.
One kilowatt-hour (kWh) is equal to 3,600,000 joules (3.6 megajoules). This conversion comes from the definition of a watt (1 watt = 1 joule/second) and the fact that one hour has 3,600 seconds:
1 kW = 1,000 watts
1 hour = 3,600 seconds
1 kWh = 1,000 W × 3,600 s = 3,600,000 J
1 J = 1 / 3,600,000 kWh = 2.77778 × 10⁻⁷ kWh
This conversion is fundamental for understanding electricity usage and energy consumption in homes and industries.
Joules and watts measure different physical quantities related to energy:
Think of it like water: joules are the total volume of water, while watts are the flow rate (liters per second).
Kilowatt-hours are the standard unit for measuring electricity consumption for billing purposes:
Energy (kWh) = Power (kW) × Time (hours)
Example: 1.5 kW × 2 hours = 3 kWh
Cost = 3 kWh × $0.15/kWh = $0.45
Understanding kWh conversions helps consumers calculate and reduce their electricity costs.
Joule to kWh conversions are essential in many practical applications:
This converter provides the precision needed for both everyday household calculations and more technical engineering applications, with adjustable decimal precision up to 4 places.
These units have standard metric prefixes for different scales of measurement:
For large-scale energy production (power plants, national grids), MWh and GWh are commonly used, while households and small businesses use kWh, and scientific applications often use joules and kilojoules.
Common energy measurements for electricity usage and power calculations.
| Joules (J) | kWh | Kilojoules (kJ) | Watt-hours (Wh) | Common Uses |
|---|---|---|---|---|
| 1 J | 2.78e-7 kWh | 0.001 kJ | 0.000278 Wh | Small energy calculations |
| 1,000 J | 0.000278 kWh | 1 kJ | 0.278 Wh | Small electrical devices |
| 3,600 J | 0.001 kWh | 3.6 kJ | 1 Wh | 1 watt for 1 hour |
| 1,000,000 J | 0.2778 kWh | 1,000 kJ | 277.78 Wh | 1 MJ of energy |
| 3,600,000 J | 1 kWh | 3,600 kJ | 1,000 Wh | Standard billing unit |
| 10,000,000 J | 2.7778 kWh | 10,000 kJ | 2,777.78 Wh | Typical daily household use |
| 36,000,000 J | 10 kWh | 36,000 kJ | 10,000 Wh | Higher household consumption |
| 3,600,000,000 J | 1,000 kWh (1 MWh) | 3,600,000 kJ | 1,000,000 Wh | Industrial/commercial use |
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