Actually the USA use the Metric System officially, not in common life: https://www.nist.gov/pml/weights-and-measures/metric-si https://www.nist.gov/pml/weights-

Actually the USA use the Metric System officially, not in common life: https://www.nist.gov/pml/weights-and-measures/metric-si https://www.nist.gov/pml/weights-and-measures/metric-si