30mm equal to how many cm?

30 mm * 1 cm/10 mm

3 cm










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30mm In Cm

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centimeter means one hundredth of a meter so 19 cm is 19/100 of a meter of 0.19 m

Divide 19 by 100 = 0.19 meters.

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RE:
30mm equal to how many cm?

This is a conversion question. Learn the following format:

Given x Desired unit/parallel unit of given = desired unit with respect to Given

For example:

We know there are 1000mm in one meter, so we can convert our given unit into meters. From meters, we can get centimeters (we know there is 100cm per each meter right?)

30mm x 1m/1000mm = 0.03m (notice how the millimeter essentially cancels itself out (30mm divided by 1000mm = 0.03) now multiplied by 1m you have exactly 0.03 meters.

You can convert this easily into centimeters. You know that there are 100 centimeters in a meter, so take your given 0.03 meters and convert accordingly.

0.03m x 100cm/1m = 3cm

Notice that now by converting things into meters you can easily convert any of these similar units of measurement.

We can go from kilometers to nanometers to picometers to zeptometers to yottameters and so on. Familiarize yourself with this chart: http://dbhs.wvusd.k12.ca.us/webdocs/Metric/Metric-Prefixes.html

Do some problems if you're so inclined.

3

1mm=0.1cm

1 cm = 10 mm
1 mm = 1/10 cm (0.1 cm)
30 mm = 30/10 cm = 3 cm

10 mm<-----> 1 cm
30 mm<-----> 3 cm

3 cm