In 1999, NASA lost a $125 million Mars orbiter because one team used metric units and another used imperial. Unit conversion isn't just schoolwork; it's critical.
Table of Contents
The Two Systems
The Metric System (SI): Used by 95% of the world. It is based on powers of 10 (100cm = 1m). Simple, logical, and scientific.
The Imperial System: Used mainly in the USA, Liberia, and Myanmar. It is based on old British agricultural units (12 inches = 1 foot).
Length: Miles vs. Kilometers
Driving in Europe? You need to know that 100 km/h is roughly 62 mph.
- 1 Mile = 1.609 Kilometers
- 1 Yard = 0.9144 Meters
- 1 Inch = 2.54 Centimeters
Temperature: Celsius vs. Fahrenheit
This is the most confusing one for travelers.
- Water Freezes: 0°C vs 32°F
- Room Temp: 20°C vs 68°F
- Body Temp: 37°C vs 98.6°F
- Water Boils: 100°C vs 212°F
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