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Recognised as Power

400 watts

  • Power
  • W
  • SI

400 watts is a measurement of power. That is 0.4 kilowatts, or 0.0004 megawatts. Below it is converted into all 8 units Nerdulator knows for power.

Common conversions

kilowatts0.4 kW
megawatts0.0004 MW
horsepower0.53640884 hp

Every other unit of power

milliwatts400,000 mW
gigawatts4 × 10^-7 GW
metric horsepower0.54384865 PS
BTU per hour1,364.85665325 BTU/h

About this quantity

CategoryPower
Unitwatt (W)
SystemSI
In watts (the base unit)400 W
Definition1 W = 1 J/s = 1 kg·m²·s⁻³: one joule of energy per second.derived from the SI base units
Double800 watts
Half200 watts

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Every value on this page was computed from “400 watts” by Nerdulator’s unit engine. Nothing here was retrieved from a database of answers or written by a model.