wunder beta📏 Converting Units of Measure
Kilometers to meters, hours to minutes, weeks to days — switching between units sounds tricky, but it all comes down to one friendly idea: the SAME amount can be written as a different number. Learn t
What you’ll learn
- Same Amount, Different NumberUnderstand that converting units keeps the amount the same while changing the number and unit name.Just as one dollar equals 100 pennies, one meter equals 100 centimeters — the same amount written two ways. Converting units never changes how much there is; it only changes the number and the unit.
- The One Big RuleLearn that a big unit equals many small units, so big-to-small means multiply and small-to-big means divide.A big unit always trades for many small units, because small units are small. So going from a big unit to a small unit, you multiply and the number grows; going from small to big, you divide and the number shrinks.
- Length: Kilometers and MetersConvert between kilometers, meters, and centimeters using the multiply/divide rule.One kilometer is 1,000 meters. To convert kilometers to meters, multiply by 1,000; to convert meters to kilometers, divide by 1,000. Worked examples show both directions with the same amount of length.
- Time: Hours, Minutes, SecondsConvert between hours, minutes, and seconds using the same rule.One hour is 60 minutes and one minute is 60 seconds. Going from a bigger time unit to a smaller one, multiply by 60. A 2-hour movie is 120 minutes, or 7,200 seconds — the same time, three ways.
- Days and WeeksConvert between weeks, days, and hours, practicing both multiplying and dividing.One day is 24 hours and one week is 7 days, so a week is 168 hours. Big-to-small uses multiplication (a week is 7 days), and small-to-big uses division (21 days ÷ 7 = 3 weeks).
- You Are a Unit ConverterConsolidate the two-way rule and see it used in real life.One rule handles every conversion: big-to-small multiply (number grows), small-to-big divide (number shrinks). Cooks, builders, and scientists all rely on it — and getting units wrong can cause real mistakes, so care matters.
Questions this course answers
Why is converting units like trading a dollar for 100 pennies?
A dollar and 100 pennies are the same amount of money. Converting units does the same thing with measurements — the amount stays the same, only the number and unit name change.
When you change a BIG unit into a SMALL unit, what happens to the number?
Small units are small, so it takes many of them to make the same amount. Going from a big unit to a small unit, you multiply and the number gets bigger — like 1 meter becoming 100 centimeters.
A path is 3 kilometers long. How many meters is that?
Kilometers (big) to meters (small) means multiply by 1,000. So 3 × 1,000 = 3,000 meters. Same distance, smaller unit, bigger number.
A soccer game lasts 2 hours. How many minutes is that, and why?
One hour is 60 minutes. Going from hours (big) to minutes (small), you multiply by 60: 2 × 60 = 120 minutes.
A camp lasts 21 days. How many weeks is that?
There are 7 days in a week. Going from days (small) up to weeks (big), you divide by 7: 21 ÷ 7 = 3 weeks.
Grounded in trusted sources
- NIST — International System of Units (SI)
- Britannica — Metric system; Units of time
- Math is Fun — Unit conversion
Every Wunder lesson is built from real, reputable sources — never invented.
Related Math courses
Wunder is a personalized learn-anything platform — tell it any topic and it builds a beautiful, fact-checked course in minutes, with narration, a knowledge check, and a college-style University track.
Browse more Math courses · All topics · Home
© 2026 Wunder Learning LLC · Terms & Privacy