# How do I determine the operating costs of my oxygen equipment?

If you have chronic obstructive pulmonary disease (COPD) and require supplemental oxygen, here is how to determine the cost of your oxygen equipment step-by-step:
1. The label on your concentrator shows the volts and amps used. Multiply the volts by the amps. For instance: 115 volts x 6 amps = 690 watts
2. Multiply the watts by .001 to obtain kilowatt hours. 690 x .001 = .69 KWH
3. Multiply KWH by the number of hours per year that you use your concentrator. For instance, if you use it 24 hours a day, that equals 8,760 hours per year. .69 KWH x 8,760 = 6,044
4. Find the cost of electricity per kilowatt from your power company. For example, 12 cents. 6,044 x .12 = \$725.28 cost per year

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