Unit conversion

12 videos
1 skill
Wait, I'm in Europe and my car only tells my distance traveled in kilometers! But I'm used to a units of distance devised by the Romans to measure the average length of 1000 paces of a soldier (the "mile")! How do I operate? This tutorial is about the fundamental skill of unit conversion. Sal's cousin Nadia being a bit confused with this was actually the reason why he started tutoring her (which led to the creation of the Khan Academy).

Converting pounds to ounces

VIDEO 1:34 minutes
We can't tell you how many times in your life you will stare at a recipe and then need to use this skill. Trust us. Let's convert pounds to ounces!

Unit conversion: gallons to quarts, pints, and cups

VIDEO 5:17 minutes
What's the difference between gallons, quarts, pints, and cups? Soooo many people go their entire lives without knowing how to convert one unit of measure to another. Take note.

Converting yards into inches

VIDEO 5:49 minutes
Converting units of measure is a skill you'll encounter many times over in everyday life. In this example, we'll look at yards, feet, and inches.

Unit conversion: arithmetic calculations on units of volume

VIDEO 5:23 minutes
Sometimes we have different units of measure and are asked to add them up. The answer can't be stated in ALL units so we have to pick one unit of measure. In this example, you'll practice that scenario with us.

Unit measurement word problem: weight (US customary)

VIDEO 7:08 minutes
We're moving between units of weight in this word problem. Ever get in an elevator with a bunch people and wonder to yourself, "How many people can this elevator safely hold?" Yeah, us too. You can solve that problem now.

Unit measurement word problem: volume (US customary)

VIDEO 3:29 minutes
Pints or gallons? Gallons or quarts? Confused? You won't be for long. This unit measurement word problem gets us thinking about moving between these units of volume.

Multiple units word problem: Road trip (example)

VIDEO 3:47 minutes
Sal solves a word problem where he finds the cost of gas in a road trip given the car's fuel efficiency, length of the trip, and price of gas.

How to solve proportion word problems with dimensional analysis (example)

VIDEO 4:13 minutes
Sal solves two related proportion word problems about a squirrel crossing the road and a car that approaches it. He does that using dimensional analysis.

Multiple units word problem: Running laps (example)

VIDEO 8:04 minutes
Sal solves a word problem where he finds the number of necessary running laps given the length of a lap and the desired running distance.

Challenging multiple units word problem: Drug dosage (example)

VIDEO 10:44 minutes
Future doctors and nurses out there, take note. This unit conversion word problem deals with converting drug dosage units, something that is commonly done in hospitals. Give it a try with us.

How to describe the same length with different units (example)

VIDEO 5:48 minutes
Sal shows how we can describe the length 4.5 yards in a variety of different units, using dimensional analysis.

Solve word problems with multiple units

Solve word problems that contain multiple quantities that are measured in different units.

Speed translation

VIDEO 9:55 minutes
Translating speed units