Millimeters (mm) and centimeters (cm) are essential metric units for measuring length. While millimeters are ideal for precision work, centimeters are commonly used for everyday measurements.
Key Conversion:
1 cm = 10 mm (exact)
1 mm = 0.1 cm
Our mm to cm converter helps you:
- Convert mm to cm instantly
- Get accurate decimal results
MM to CM Converter
MM to CM Conversion Chart
Quick reference table showing common millimeter measurements converted to centimeters:
| Millimeters (mm) | Centimeters (cm) | Everyday Example |
|---|---|---|
| 1 mm | 0.1 cm | Credit card thickness |
| 5 mm | 0.5 cm | Standard pencil lead |
| 10 mm | 1 cm | Chess pawn base |
| 25 mm | 2.5 cm | Matchbox width |
| 50 mm | 5 cm | Golf ball diameter |
| 70 mm | 7 cm | House key length |
| 100 mm | 10 cm | Smartphone length |
| 250 mm | 25 cm | Standard ruler length |
Note: 1 centimeter = exactly 10 millimeters (metric system standard). For precise conversions, use our mm to cm converter above.
How to Convert MM to CM Manually
Conversion Formula
1 millimeter (mm) = 0.1 centimeters (cm)
cm = mm ÷ 10
Since 1 cm equals exactly 10 mm, you can convert any millimeter measurement to centimeters by dividing by 10.
Step-by-Step Conversion
Take your measurement in millimeters
Example: 70 mm
Divide by 10
70 ÷ 10 = 7
The result is centimeters
70 mm = 7 cm
Quick Mental Math Tip
To convert mm to cm in your head, simply move the decimal point one place to the left:
120 mm → 12.0 cm
45 mm → 4.5 cm
8 mm → 0.8 cm
1 millimeter to centimeter
1 millimeter = 0.1 centimeter – A millimeter is one-tenth of a centimeter
1 cm how many mm
1 cm = 10 mm – One centimeter is made up of 10 millimeters.
10mm in cm
10 mm = 1 cm – Ten millimeters equal exactly one centimeter.
12mm to cm
12 mm = 1.2 cm – Twelve millimeters convert to 1.2 centimeters.
150 mm to cm
150 mm = 15 cm – One hundred fifty millimeters is the same as 15 centimeters.
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