There are 1000 milliwatts in a watt. There are 1000 watts in a kilowatt. Therefore, there are 1 million milliwatts in one kilowatt.
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One Kilowatt hour is one Unit. Expressed as :- 1 KWH = I UNIT
1 unit is 1 kilowatthour, ie 1 kilowatt for 1 hour
Residential Electric RateCost per Kilowatt Hour (Cents) as of 9/1/11 Single Family Dwelling8.850Basic Service$10.00
It depends on the power rating of the saw. If it is a 1 KW (Kilowatt) saw then it will use 1 KWH (Kilowatt hour) of electricity for every hour it is used. This is equivalent to 1 unit of electricity. If it is 500 W (Watt) then it will use half this. If it is 2 KW it will use double this.
You don't! They are two different entities - like converting cars to washing machines! Simply put: Voltage is equal to resistance multiplied by current therefore current = voltage divided by resistance therefore a resistance of 23ohms at 230 volts will draw 10amps current. Watts is equal voltage multiplied by current therefore a 230volt fire drawing 10 amps equals 2.3kilowatts or 2300 watts. Use this for one hour and your electricity usage equals 2.3Kilowatt hours, say costing approx 15p per KWH = 34.5 pence. Tom.