The centimeter equals one hundredth of a meter and is the everyday metric unit for body measurements, clothing sizes and furniture. European clothing tags, height on ID documents and household rulers are all marked in cm. An A4 sheet is 21 ร 29.7 cm.
Real-world: An average adult is 160โ185 cm tall. An A4 sheet is 21 ร 29.7 cm. A standard passport photo is 3.5 ร 4.5 cm.
Read full centimeter reference โThe nautical mile equals 1852 meters exactly โ defined as one minute of arc along a meridian. It is the standard distance unit for marine and air navigation worldwide. Ship and aircraft speeds are given in knots, where 1 knot = 1 nautical mile per hour.
Real-world: Territorial waters extend 12 nautical miles from the coastline. London Heathrow to New York JFK is about 3000 nmi.
Read full nautical mile reference โ