4 millimeters to centimeters
4 millimeters = 0.4 centimeters
Rounded to a practical precision: 0.4 cm.
Guide & FAQHow the calculation works · Nearby values · About these units · Frequently asked questions
How the calculation works
One millimeter is 0.1 centimeters, so:
4 mm × 0.1 = 0.4 cmReversing it, 0.4 centimeters ÷ 0.1 returns 4 millimeters.
Nearby values
| Millimeters | Centimeters |
|---|---|
| 2 mm | 0.2 cm |
| 2.5 mm | 0.25 cm |
| 3 mm | 0.3 cm |
| 3.5 mm | 0.35 cm |
| 4 mm | 0.4 cm |
| 4.5 mm | 0.45 cm |
| 5 mm | 0.5 cm |
| 5.5 mm | 0.55 cm |
| 6 mm | 0.6 cm |
In everyday terms, 4 millimeters is thinner than a pencil.
About these units
Millimeter (mm) — A millimetre is one thousandth of a metre and is the default unit on engineering drawings and rulers.
Centimeter (cm) — A centimetre is one hundredth of a metre, the everyday metric unit for body measurements and small objects.
Frequently asked questions
How many centimeters is 4 millimeters?
4 millimeters is 0.4 centimeters.
How do I convert millimeters to centimeters myself?
Multiply by 0.1. To go back, divide by 0.1 — or multiply by 10.
Is this figure exact?
The conversion factor between the millimeter and the centimeter is fixed by definition. The figure above is rounded for readability; the converter carries full precision.
Convert other values
- 4 millimeters to centimeters
- 5 millimeters to centimeters
- 20 millimeters to centimeters
- 25 millimeters to centimeters
- 36 millimeters to centimeters
- 120 millimeters to centimeters
- 150 millimeters to centimeters
- 200 millimeters to centimeters
- 500 millimeters to centimeters
Full millimeters to centimeters converter · All length converters