800 Watts to Joules
Watts measure power and joules measure energy, so the answer depends on time. Here is what a 800 W device uses over each period.
800 J per second
Because 1 watt = 1 joule per second, 800 W delivers 800 J every second it runs.
- Per minute
- 48,000 J
- Per hour
- 2,880,000 J
- Per hour (kWh)
- 0.8 kWh
- Per day
- 69,120,000 J
800 watts to joules, explained
A watt is a rate: one watt means one joule of energy is used every second. So 800 watts means 800 joules per second. To get a total number of joules you multiply by how long the power runs.
For example, a 800 W device left on for one hour uses 800 × 3,600 = 2,880,000 J. Over a full day it uses 69,120,000 J. On an electricity bill, one hour of use is 0.8 kWh.
800 W draws about the same power as 13 old-style 60 W incandescent bulbs running at once. One hour at 800 W consumes 0.8 kWh of electricity — about $0.120 at a US average residential rate of $0.15 per kWh.
joules = 800 W × time in secondsWaffle iron (800 W)
A household countertop waffle maker draws about 800 watts to heat its heavy griddle plates.
Electrical Power Comparison Scale
Need a different power or time? Use the interactive converter below for any combination.
800 W energy over time
| Time on | Energy (joules) |
|---|---|
| 1 second | 800 J |
| 1 minute | 48,000 J |
| 10 minutes | 480,000 J |
| 1 hour | 2,880,000 J |
| 6 hours | 17,280,000 J |
| 1 day | 69,120,000 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: 800 watts
How many joules is 800 watts?
800 watts is not a fixed number of joules on its own — watts measure power and joules measure energy, so you need a time. A 800 W device uses 800 J every second, 2,880,000 J over one hour (0.8 kWh).
How do you convert 800 watts to joules?
Multiply 800 by the number of seconds the power runs. Joules = 800 × time in seconds. For one hour that is 800 × 3,600 = 2,880,000 J.
How much energy does a 800 W device use per hour?
A 800 W device running for one hour uses 2,880,000 J, which is 0.8 kWh on an electricity bill.