Joules to Watts Converter
Convert joules to watts using time. Since power is energy divided by time, dividing joules by seconds gives watts. The formula is Watts = Joules ÷ Time (seconds). This is essential for calculating power output from energy measurements.
How to Convert Joules to Watts
- Determine the energy in joules.
- Determine the time duration in seconds.
- Divide joules by seconds to get watts.
- Divide by 1000 for kilowatts, or by 745.7 for horsepower.
Formula
Watts = Joules ÷ Seconds
W = J / s
1 Watt = 1 Joule per second (1 W = 1 J/s)
Example Calculation
1000 joules of energy delivered in 10 seconds:
Power = 1000 J ÷ 10 s = 100 W
A battery delivering 36,000 J over 1 minute:
Power = 36,000 J ÷ 60 s = 600 W
Joules to Watts Reference Table
| Energy | Time | Power |
|---|---|---|
| 1 J | 1 s | 1 W |
| 100 J | 10 s | 10 W |
| 500 J | 5 s | 100 W |
| 1,000 J | 10 s | 100 W |
| 3,600 J | 60 s | 60 W |
| 6,000 J | 60 s | 100 W |
| 36,000 J | 60 s | 600 W |
| 3,600,000 J | 3600 s | 1,000 W (1 kW) |
Frequently Asked Questions
What is a watt?
A watt is the SI unit of power, defined as one joule per second. It measures the rate at which energy is transferred or converted.
What is the difference between joules and watts?
Joules measure total energy (how much), while watts measure power (how fast energy is used). Watts = Joules per second.
How do joules relate to energy consumption?
Energy consumption is measured in joules or kilowatt-hours (kWh). 1 kWh = 3,600,000 joules. Your electricity bill measures energy in kWh.
What is the power formula?
Power (W) = Energy (J) ÷ Time (s). Alternatively, Power = Voltage × Current, or Power = Force × Velocity.
How many joules per second is 1 kilowatt?
1 kilowatt = 1000 watts = 1000 joules per second. A 1 kW appliance uses 1000 joules of energy every second.