200 Watts to Joules
Watts measure power and joules measure energy, so the answer depends on time. Here is what a 200 W device uses over each period.
200 J per second
Because 1 watt = 1 joule per second, 200 W delivers 200 J every second it runs.
- Per minute
- 12,000 J
- Per hour
- 720,000 J
- Per hour (kWh)
- 0.2 kWh
- Per day
- 17,280,000 J
200 watts to joules, explained
A watt is a rate: one watt means one joule of energy is used every second. So 200 watts means 200 joules per second. To get a total number of joules you multiply by how long the power runs.
For example, a 200 W device left on for one hour uses 200 × 3,600 = 720,000 J. Over a full day it uses 17,280,000 J. On an electricity bill, one hour of use is 0.2 kWh.
200 W draws about the same power as 3.3 old-style 60 W incandescent bulbs running at once. One hour at 200 W consumes 0.2 kWh of electricity — about $0.030 at a US average residential rate of $0.15 per kWh.
joules = 200 W × time in secondsElectric sewing machine (200 W)
A household sewing machine draws about 200 watts when the motor is fully active.
Electrical Power Comparison Scale
Need a different power or time? Use the interactive converter below for any combination.
200 W energy over time
| Time on | Energy (joules) |
|---|---|
| 1 second | 200 J |
| 1 minute | 12,000 J |
| 10 minutes | 120,000 J |
| 1 hour | 720,000 J |
| 6 hours | 4,320,000 J |
| 1 day | 17,280,000 J |
Convert any wattage and time
The full Watts to Joules converter handles W, kW, MW, any time unit, and the reverse joules→watts and time calculations.
FAQ: 200 watts
How many joules is 200 watts?
200 watts is not a fixed number of joules on its own — watts measure power and joules measure energy, so you need a time. A 200 W device uses 200 J every second, 720,000 J over one hour (0.2 kWh).
How do you convert 200 watts to joules?
Multiply 200 by the number of seconds the power runs. Joules = 200 × time in seconds. For one hour that is 200 × 3,600 = 720,000 J.
How much energy does a 200 W device use per hour?
A 200 W device running for one hour uses 720,000 J, which is 0.2 kWh on an electricity bill.