United States customary units

They still didn’t switch to the metric system in the United States. They are using non-metric, archaic Imperial system of weights and measures. I collected some hints which are helpful where you need to convert units from one system to another.


  • Extremely cold day: -40C = -40F.
  • Freezing point of water is 0C = 32F.
  • Room temperature is 21C = 70F.
  • Body temperature is about 37C = 98.6F.
  • Water boils at 100C = 212F.
  • You can also calculate yourself: [°F] = [°C] ×  95 + 32.


One foot is equal to 0.3048 m. The foot comprises 12 inches and three feet compose a yard.


One mile is equal to 1.609344 km.


3 responses to “United States customary units”

  1. One I know from lifting weights is 1 pound = 2.205 kilograms.

    1. Actually it is the other way around: 1 kg = 2.205 lbs 🙂

      1. Oh yeah, duh! haha