what is the formula for determining watts?
446737
The formula for calculating wattage is: W (joules per second) = V (joules per coulomb) x A (coulombs per second) where W is watts, V is volts, and A is amperes of current. In practical terms, wattage is the power produced or used per second. For example, a 60-watt light bulb uses 60 joules per second.
265444
Multiply the device's wattage by the number of hours the appliance is used per day. Divide by 1000. Multiply by your kWh rate.
170192
Divide the number of watts by 1000 to convert the number from watts to kilowatts. 60W divided by 1000 results in 0.06kW. Multiply the number of kilowatts by the number of hours the device will be used. If the device will be used for three hours, multiply 0.06kW by three to produce 0.18kWh.
426211
To determine the wattage, use a simple multiplication formula. The ampere (or amps) is the amount of electricity used. Voltage measures the force or pressure of the electricity. The number of watts is equal to amps multiplied by volts.
437519
You can estimate the total running load by adding up the running wattages of all items to be powered. If the name plate show only amps and voltage the wattage can estimated by multiplying volts times amps to calculate watts. Amps times Volts equals Watts. The watts total divided by 1000 is kW.
811638
['fixture watts = bulb watts × bulb quantity.', 'kWh = Power(W) × Time(hrs) ÷ 1,000.', 'monthly kWh = kWh per day × 30.', 'price = kWh × cost per kWh.']
944380
The formula for electrical power is P = I \times E. "Power (in watts) equals Current (in amperes) multiplied by Potential Energy (in volts)." How much power is being used in a circuit when the applied voltage is 12 volts DC and the current is 2.5 amperes?
1326480
Watts = Amps x Volts 10 Amps x 120 Volts = 1200 Watts. 5 Amps x 240 Volts = 1200 Watts.
563060
One kilowatt is equal to 1000 watts, so to calculate how many kWh a device uses, divide the watt-hours from the previous step by 1000.
712873
Multiply the width by the length for each room or room segment, if applicable. Multiply the result by 1.5 to determine the estimated watts to sufficiently light a room. For example, for a room 10 feet wide by 12 feet long, multiply 10 times 12 to get 120, then multiply by 1.5 to get 180 watts.
1472866
Step A: Convert watts to amps Amp-hours (at 12 volts) = watt-hours / 12 volts = 1470 / 12 = 122.5 amp-hours.
306435
So the power dissipated by the 5 ohm resistor is P = I^2 R = (3 amps)^2 * (5 ohms) = 45 watts. Feel free to make any corrections.
1359070
['Fan Load= No x Watt =2×60=120 Watt.', 'Fan Load=(No x Watt)/P.F=(2×60)/0.8= 150VA.', 'Computer Load= No x Watt =1×200=200 Watt.', 'Computer Load=(No x Watt)/P.F =(1×200)/0.8= 250VA.', 'Tube Light Load= No x Watt =2×30=60 Watt.', 'Tube Light Load=(No x Watt)/P.F =(2×30)/0.8= 75VA.', 'Total Electrical Load=120+200+60 =380 Watt.']
811962
Multiply by hours used per day. The wattage tells you the rate energy is consumed while the appliance is active. Multiply the wattage by the number of hours the device runs during an average day. Example: If the microwave runs for half an hour each day, multiply 780 watts x 0.5 hours / day = 390 watt hours per day.
1068575
Simply multiply the wattage by the number of hours you watch TV per day to determine your watt-hours. Divide that number by 1,000 to find your kilowatt-hours, then multiply that figure by your energy provider's kWh rate to see how much it will cost you to use the TV per day.
1242926
calculate battery power of the UPS (ie battery voltage) * AH. time = (inverter efficiency * battery volt * AH)/load in watts)
833786
Typical idle power ranges from 15 watts to 50 watts for a home-size inverter. An inverter's spec sheet may describe the inverter's “idle current” in amps. To get watts, just multiply the amps times the DC voltage of the system.