my blender says it's 500 watts

[Joseph F]

I think a better question is, "Is it 500W in, or 500W out?".

 

[randay]

only 360w? you cant even blend a finger with that pitiful amount of power. go ahead, stick your finger down in there and turn it on!

 

[Fritzo]

 

[ElFenix]

only 360w? you cant even blend a finger with that pitiful amount of power. go ahead, stick your finger down in there and turn it on!

it's a waring pro, bish. 2 speeds cuz i ain't got time for 20.

 

[Gibson486]

500 watts is the power under a heavy load. The 3 amps on the nameplate is the power under a normal condition load.

 

[edro]

Watts = 1.44 * Amps * AC Line voltage

496.8 watts = 1.44 * 3 amps * 115 volts That 500w number is a close approximation. If you have ever looked at hot water heater elements they usually have a 1KW spread based on line voltage of 230 - 240 volts AC.

That number will fluctuate a little and and some others mentioned you will have an initial spike that can exceed 500watts by quite a bit.

1.414 = 2*sqrt(2)
sqrt(2)=.707, .707*Peak value=RMS value

They don't normally put RMS on nameplates.
115v is actually RMS of 170v peak-to-peak.
You only multiply by 1.414 to get from RMS to peak.

Watts = V*A*PF
115*3*(.7-.9PF estimate for blender motor)= 276W

 

[jteef]

1.414 = 2*sqrt(2)

you mean 1.414 = sqrt(2)

500W is approximately the peak instantaneous power for the ~millisecond the AC waveform is near a peak or valley.

sofaking glad nobody has included RMS power in any of the replies so far in this thread.