• It’s nice to have some quick mental conversions ready.

    1 mile is roughly 1.6 km, so 100 miles is roughly 160 km

    3 feet is roughly a meter

    2 pounds are roughly 1 kg

    1 gallon is roughly 4 liters

    32 fahrenheit it 0 celcius, 100 fahrenheit is slightly over body temperature, 200 fahrenheit is almost enough to boil water… Any other value requires math to figure out…