1 CM to MM Converter

1 CM to MM

Quick answer: 1 cm = 10 millimeters. This page shows you how to convert 1 centimeter to mm with the formula, examples, and a handy conversion table for nearby values.

How to Convert 1 CM to MM

Formula: mm = cm × 10

Calculation:
1 × 10 = 10 mm

Result: 1 cm = 10 millimeters

1 CM in MM

1 cm equals
10
millimeters
1 cm × 10 = 10 mm

Try other values:

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CM to MM Conversion Table (Around 1 cm)

CMMM
0.11
0.252.5
0.55
0.757.5
CMMM
110
1.515
220

Understanding 1 CM

1 CM in Context

1 centimeter equals exactly 10 millimeters. This is a fundamental metric conversion used in engineering, manufacturing, and everyday measurements.

Quick Reference

1 cm = 10 mm = 0.01 m

Also equals approximately 0.3937 inches or about the width of a pencil.

Frequently Asked Questions

What is 1 cm in mm?
1 cm equals exactly 10 millimeters.
How do you convert 1 cm to mm?
Multiply 1 by 10. The calculation is: 1 × 10 = 10 mm.
Why does 1 cm equal 10 mm?
The metric system is based on powers of 10. A centimeter is one hundredth of a meter, and a millimeter is one thousandth of a meter, so there are exactly 10 mm in 1 cm.
What is 1 cm in inches?
1 cm equals approximately 0.3937 inches, or roughly 3/8 of an inch.
How big is 1 cm?
1 cm is approximately the width of a standard pencil or the diameter of a small button. It is slightly less than half an inch.