21 millimeters to centimeters conversion (21 mm to cm)
21 millimeters = 2.1 centimeters
Use the millimeters to centimeters converter below to convert your length measurements. Enter the number of millimeters and the converter will display its equivalent in centimeters.
To convert 21 millimeters to centimeters, divide 21 by the conversion factor 10 (because 1 millimeter is equivalent to 1/10 centimeters). So, to find out what is 21 millimeters in centimeters, the calculation is as follows: 21 millimeters ÷ 10 = 2.1 centimeters. Therefore, 21 millimeters is equal to 2.1 centimeters. From this answer, we can also deduce that there are 2.1 cm in 21 mm.
The conversion formula to convert millimeters to centimeters is as follows:
centimeters = millimeters ÷ 10
The millimeter and the centimeter are both units of length derived from the meter. The meter is the base unit of length in the International System of Units (the modern form of the metric system and the most widely used system of measurement in the world). The prefix "milli-" means one thousandth, so 1 millimeter is equivalent to one thousandth of a meter (0.001 meters). The prefix "centi-" means one hundredth, so 1 centimeter is equivalent to one hundredth of a meter (0.01 meters). The conversion factor (10) facilitates the conversion from one unit of measurement (21 millimeters in this case) to another (in centimeters) while maintaining the accuracy of length conversions.
A length of 21 millimeters, measured with a ruler, vernier caliper, micrometer, or tape measure, often needs to be converted to centimeters in certain situations. Our conversion calculator is the fastest and most accurate option for converting 21 millimeters to centimeters. It can also be used to convert other dimensions, including size, width, height, small distances, thickness, and diameter.
The conversion table below provides length measurements in millimeters (mm) and their equivalents in centimeters (cm) for values ranging from 21 to 21.95 millimeters in increments of 0.05 millimeters.
| Millimeters (mm) | Centimeters (cm) |
|---|---|
| 21 | 2.1 |
| 21.05 | 2.105 |
| 21.1 | 2.11 |
| 21.15 | 2.115 |
| 21.2 | 2.12 |
| 21.25 | 2.125 |
| 21.3 | 2.13 |
| 21.35 | 2.135 |
| 21.4 | 2.14 |
| 21.45 | 2.145 |
| 21.5 | 2.15 |
| 21.55 | 2.155 |
| 21.6 | 2.16 |
| 21.65 | 2.165 |
| 21.7 | 2.17 |
| 21.75 | 2.175 |
| 21.8 | 2.18 |
| 21.85 | 2.185 |
| 21.9 | 2.19 |
| 21.95 | 2.195 |
The centimeter equivalents indicated in the conversion table above can be rounded according to the required precision, whether in terms of significant figures or decimals.
The table below provides the equivalents of 21 mm in other units of length.
| Millimeters (mm) | Equivalents in other units |
|---|---|
| 21 | 2.1 × 10-5 kilometers |
| 21 | 0.021 meters |
| 21 | 21000 micrometers |
| 21 | 1.30488 × 10-5 miles |
| 21 | 1.13391 × 10-5 nautical miles |
| 21 | 21000000 nanometers |
| 21 | 0.0688976 feet |
| 21 | 0.826772 inches |
| 21 | 0.0229659 yards |