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Wattage = voltage times amperage. That's for DC.
For AC there is a power factor PF = cos phi you have do multiply with.
Another Answer
There are lots of different ways of calculating power; it depends entirely on what information you have to start with. In basic terms, power is simply work divided by time.
Wiki User
∙ 10y ago
Wiki User
∙ 13y agoYou can calculate wattage 3 ways:
- Watts = E2/R
- Watts = I2x R
- Watts = E x I.
Wiki User
∙ 9y agoWatts can be checked and measured by using an instrument called a multimeter. The multimeter will measure different details of an electrical circuit.
Wiki User
∙ 11y agothrough A wattmeter. it reads and measures the electric power of a circuit.
Wiki User
∙ 8y agoWattage can be determined by three equations. They are W = I x E, W = I squared x R and W = E squared/R. W = watts, I = amps, E + volts and R = resistance in ohms.
Wiki User
∙ 15y agoWatts is the product of Amps x Volts.
Wiki User
∙ 14y agoAmps times Volts
Wiki User
∙ 8y agoVolts x Amps
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How do you determine the amps for a halogen lamp?
You can determine the amps of any power consuming source by dividing the watts by the volts. Example: If the bulb is 60 watts and your volts are 120, then 60/120 = .5 amps. Or you could use an amp probe.
How many watts in 20 volts?
You need to have the amperage to determine how many volts you get out of 20 watts.
Does a lighting fixture use watts or is it the bulb that uses watts because my fixture says 660 watts but the CFL bulb is only 23 watts?
The watts determine how much energy is taken and how much heat is produced. You need to look at the lumens to see how much light is produced. CFLs produce 4-5 times more lumens than incandescent bulbs, or 3-4 times more than halogens, for the same power in watts.
1200 watts is equal to how many amps?
Use ohms law on any cal. divide watts into volts equal amps how many time does 120volts go into 1200watts=10amps <<>> 1200 watts is equal to zero amps. To determine the amperage associated with 1200 watts a voltage needs to be stated. I = W/E, Amps = Watts/Volts.
How to determine the amount of watts needed to operate a household?
You can connect a watt meter to the circuit or it can be done by calculation. By calculation use this formula, Watts = Amps x Volts.
How do you determine system watts for lighting?
The equation is quite simple. Multiply the number of lights on the system by their wattage to determine the system wattage.
How do you determine the amps for a halogen lamp?
You can determine the amps of any power consuming source by dividing the watts by the volts. Example: If the bulb is 60 watts and your volts are 120, then 60/120 = .5 amps. Or you could use an amp probe.
How many watts in 20 volts?
You need to have the amperage to determine how many volts you get out of 20 watts.
How many watts in 240volts?
There are zero watts in 240 volts. To determine watts, an amperage or a resistance must be supplied. W = Amps x Volts, W = Amps (squared) x Resistance (in Ohms), or W = Voltage (squared)/Resistance.
Convert horsepower to watts?
Depends upon the voltage. At 110 volts, 800 watts = 7.27 amps. At 115 volts, 800 watts = 6.96 amps. At 120 volts, 800 watts = 6.67 amps. At 220 volts, 800 watts = 3.64 amps. Just divide the wattage by the voltage to determine the amperage. (You can also divide the wattage by the amperage to determine the voltage!)
Does a lighting fixture use watts or is it the bulb that uses watts because my fixture says 660 watts but the CFL bulb is only 23 watts?
The watts determine how much energy is taken and how much heat is produced. You need to look at the lumens to see how much light is produced. CFLs produce 4-5 times more lumens than incandescent bulbs, or 3-4 times more than halogens, for the same power in watts.
How do you determine the amount of electrical energy used by a device?
Measure the current flowing through the device and the voltage across it; multiply the current by the voltage to get the power in Watts. Watts = Volts x Amps ; Watts = Amps2 x Resistance (steady state answers using friendly units)
1200 watts is equal to how many amps?
Use ohms law on any cal. divide watts into volts equal amps how many time does 120volts go into 1200watts=10amps <<>> 1200 watts is equal to zero amps. To determine the amperage associated with 1200 watts a voltage needs to be stated. I = W/E, Amps = Watts/Volts.
How do you determine the power supplied to a motor with 1.0mA of current at 3.0V potential difference?
current times voltage equals watts or power
How to determine the amount of watts needed to operate a household?
You can connect a watt meter to the circuit or it can be done by calculation. By calculation use this formula, Watts = Amps x Volts.
How many watts can a 6-piston car engine make?
How big around are the pistons? What's the stroke of the engine? How fast is the engine going to be run? All of these things (and more) will determine an engine's horsepower rating. That rating can then be converted into watts.
When a coffee maker uses 10.0 amps of current from a 120-volt line. how much power does it use?
To determine the watts of power, multiply voltage x amperage. In this case, 120 volts x 10 amps- which is 1200 watts.
