How big is a millimeter? How heavy is a kilogram? Let's find out!
Metric units are like a staircase. Each step is a multiply or divide by 10, 100, or 1,000.
Every metric unit uses the same pattern. Here it is for meters:
This same pattern works for grams too! 1 kilogram = 1,000 grams.
There are 1,000 milli-things in 1 whole thing.
Imagine cutting a meter stick into 1,000 tiny equal pieces. Each piece is 1 millimeter. Here are all 1,000 of them:
Each tiny square above is 1 millimeter. The whole grid is 1 meter. That's a LOT of pieces!
It works for weight too: 1 gram = 1,000 milligrams. A paper clip weighs about 1 gram — imagine breaking it into 1,000 specks of dust!
There are 100 centi-things in 1 whole thing.
A meter stick has exactly 100 centimeters. You can count them on the ruler markings! Here are all 100:
Each square is 1 centimeter. The whole grid is 1 meter. Way easier to count than millimeters!
And there are 10 millimeters in every centimeter. So centimeters are 10 times bigger than millimeters!
Think of it like money: if a meter is a dollar bill, a centimeter is a penny. There are 100 pennies in a dollar!
1 kilo-thing = 1,000 whole things.
1 kilometer is 1,000 meters. That's like lining up 1,000 meter sticks end to end — they'd stretch about 10 football fields!
For weight: 1 kilogram = 1,000 grams. A bag of sugar from the store weighs about 1 kilogram. That's 1,000 paper clips!
Here's the full chain for meters:
And for grams:
The magic number is always 10, 100, or 1,000!