# Using Conversion Ratios

## What does it mean?

### Conversion Table

• 1 centimeter = 0.394 inches
• 1 meter = 39.370 inches = 3.281 feet
• 1 kilometer = 0.621 miles
• 1 liter = 0.264 gallons
• 1 newton = 0.225 pounds
• 1 joule = 0.738 foot-pounds
• 1 gram = 0.035 ounces
• 1 kilogram = 2.205 pounds
• 1 inch = 2.540 centimeters
• 1 foot = 30.480 centimeters = 0.305 meters
• 1 mile = 1.609 kilometers
• 1 gram = 3.785 liters
• 1 pound = 4.448 newtons
• 1 foot-lb = 1.356 joules
• 1 pound = 0.454 kilograms

## What does it look like?

12 meters = ? feet $$12 * 3.281 = 3.372 feet$$ 2 miles = ? kilometers $$2 * 1.609 = 3.218 kilometers$$ 2 pound = ? kilograms $$2 * 0.454 = 0.908 kilograms$$ 77 Fahrenheit = ? Celsius $$( 77 - 32 ) * \frac{5}{9} = 25 C$$ 77 Celsius = ? Fahrenheit $$( 77 * \frac{9}{5}) + 32 = 170.6 F$$ 0 Fahrenheit = ? Celsius $$(0 - 32 ) * \frac{5}{9} = 17.7 C$$ 0 Celsius = ? Fahrenheit $$( 0 * \frac{9}{5}) + 32 = 32 F$$

## You'll use it...

Every day in real life.

## Videos

### Conversion Between Metric Units

Watch a Khan Academy Video »
Length: 5:16

### U.S. Customary and Metric Units

Watch a Khan Academy Video »
Length: 5:10