How to Convert Ohms to Kilowatts

Higher resistances reduce the energy that an appliance can transfer.
••• Comstock/Comstock/Getty Images

The number of ohms in a circuit describes the circuit's resistance to current. This value is the ratio between the circuit's voltage, which is the potential difference in charge across it, and its current, which is its rate of flow of charge. The number of kilowatts that go through a circuit is the rate at which the circuit transfers energy. A circuit's power rating is the product of its voltage and current, but if you know its resistance, you only need to know one other of these variables to calculate the power rating.

    Square the circuit's voltage. For example, if the circuit runs at a voltage of 120 volts, then 120² = 14,400 V².

    Divide this answer by the circuit's resistance, measured in ohms. For example, if the circuit has a resistance of 24 ohms, then 14,400 ÷ 24 = 600 volt-amperes, or 600 Watts.

    Divide this answer by 1,000, which is the number of Watts in a kilowatt: 600 ÷ 1,000 = 0.6. This is the power running through the circuit, measured in kilowatts.

Related Articles

How to Convert Amps Into BTUs
How to Convert Reserve Capacity to Amp Hours
How to Calculate Voltage Across a Resistor
How to Convert 12 Volt to 6 Volt
How to Calculate Millivolts to Amps
How to Calculate 30 KW to Amps
How to Convert KWH to KVA
How to Change Electrical Amps to Watts
How to Size a Capacitor to an Electric Motor
How to Convert 12 Volt Alternator to 120 Volts
How to Measure the Power Output From a Battery
How to Calculate How Long a Battery Will Last
How to Calculate Power Rating
How to Calculate IRMS
How to Build a Battery Isolator
How to Calculate the Magnetic Force of a Solenoid
How to Wire a Battery in Series
How to Calculate Output Voltage
How to Find Resistance With Power & Voltage
How to Convert Square Meters to Square Feet With a...

Dont Go!

We Have More Great Sciencing Articles!