Millimeter to Centimeter Converter
Length · unit-converter
Convert Millimeter to Centimeter with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use SI-based definitions (international yard, nautical mile, etc.).
Calculator
From: Millimeter (mm)
To: Centimeter (cm)
About Millimeter
The millimeter is a metric unit equal to one thousandth of a meter (0.001 m). It is used for precision engineering, 3D printing, and small tolerances.
About Centimeter
The centimeter is a metric unit equal to one hundredth of a meter (0.01 m). It is convenient for everyday objects, paper sizes, and body measurements.
How to convert millimeters to centimeters
1 millimeter is equal to 0.1 centimeter:
1 mm = (0.001 m ÷ 0.01 m) cm = 0.1 cm
1 millimeter = 1/10 centimeter.
Each millimeter is defined as 0.001 m and each centimeter as 0.01 m, so one mm equals 0.001 ÷ 0.01 cm = 0.1 cm.
Let d(mm) be the numeric value of the same length measured in Millimeter (mm), and d(cm) the value in Centimeter (cm). Then:
d(cm) = d(mm) × (0.001 / 0.01)
Equivalently, divide by how many mm fit into one cm (meters per cm divided by meters per mm):
d(cm) = d(mm) ÷ 10
Or: centimeter = millimeter ÷ 10
Examples
Example #1: Convert 20 mm to centimeter
20 mm = 20 mm × (0.001/0.01) cm = 2 cm
20 mm = 20 mm ÷ 10 = 2 cm
Example #2: Convert 50 mm to centimeter
50 mm = 50 mm × (0.001/0.01) cm = 5 cm
50 mm = 50 mm ÷ 10 = 5 cm
Summary
To convert Millimeter to Centimeter, multiply the value in mm by the ratio of meters per mm divided by meters per cm. Equivalently: value_cm = value_mm × (0.001 / 0.01). Numerically, 1 mm equals 0.1 cm.
Relationship context
Both units are metric (SI) and tied to the meter. Converting between them uses powers of ten (or simple rational factors), so the relationship is exact in decimal arithmetic. The factor from Millimeter to Centimeter is 1.000000e-1 (1 mm = 0.1 cm).
Conversion tables
| Millimeter (mm) | Centimeter (cm) |
|---|---|
| 0.1 | 0.01 |
| 1 | 0.1 |
| 2 | 0.2 |
| 3 | 0.3 |
| 4 | 0.4 |
| 5 | 0.5 |
| 6 | 0.6 |
| 7 | 0.7 |
| 8 | 0.8 |
| 9 | 0.9 |
| Millimeter (mm) | Centimeter (cm) |
|---|---|
| 10 | 1 |
| 20 | 2 |
| 30 | 3 |
| 40 | 4 |
| 50 | 5 |
| 60 | 6 |
| 70 | 7 |
| 80 | 8 |
| 90 | 9 |
| 100 | 10 |
Conversions outside the hub list
The grid on the category page lists hub units only. These pairs include at least one unit outside that hub set (same tools: formulas and tables on each page).
- mm to nmiMillimeter to Nautical Mile
- mm to chainMillimeter to Chain
- mm to fathomMillimeter to Fathom
- mm to umMillimeter to Micrometer
- mm to nmMillimeter to Nanometer
- mm to angstromMillimeter to Angstrom
- mm to pmMillimeter to Picometer
- nmi to cmNautical Mile to Centimeter
- chain to cmChain to Centimeter
- fathom to cmFathom to Centimeter
- um to cmMicrometer to Centimeter
- nm to cmNanometer to Centimeter