Because they refer to the exact same measurement. A liter is usually - it gets tricky actually, because there are really several definitions of liter, but the one we usually use is defined as the volume of one kilogram of water. 1 gram is also defined as the volume of 1 cubic centimeter (cm3) of water. This means that 1 gram = 1/1000 liter or 1 milliliter (ml) or (in other words) 1 ml = 1 cm3
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The liter is the name given to a volume amount equal to a cubic decimeter, which works out that there are 1000 cm³ in a liter. Since milli is 1/1000, then there are 1000 mL in a liter as well, so they are equal.
A cc (cubic centimeter, cm3) and a mL (milliliter) are equal to each other in terms of volume.
1 cubic meter = 1000 000 cubic centimeter (cc)
1 cubic meter = 1000 liters = 1000 000 milliliters (ml)
hence 1 cc = 1 ml
ANSWER I assume you mean "does 1 mL = 1 cc. The answer is yes. 1 ml = 1 cc. 100 ml = 100 cc.
There are 2.1 milliliters in 2.1 cm3. The volume of a cube with a side length of 1 cm is equal to 1 cm3, which is equivalent to 1 milliliter.
There are 30 milliliters in 30 cc (cubic centimeters), as 1 cc is equal to 1 milliliter.
There are 1 cubic centimeter (cc) in 1 milliliter (ml). So, 1.5 ml is equal to 1.5 cc.
1 milliliter is equal to 1 cubic centimeter (cm3). Therefore, 120 milliliters is equal to 120 cubic centimeters.