# 4 Centimeter to Millimeter

Convert 4 (four) Centimeters to Millimeters (cm to mm) with our conversion calculator.

4 Centimeters to Millimeters equals 40.00 mm.

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Convert 4 Centimeters to Millimeters (cm to mm) with our conversion calculator.

4 Centimeters to Millimeters equals 40 mm.

To convert 4 centimeters (cm) to millimeters (mm), the calculation is straightforward since 1 centimeter equals 10 millimeters. The conversion formula hence is: the length in millimeters is equal to the length in centimeters multiplied by 10. Applying this formula to 4 centimeters gives:

$$[ 4 \text{ cm} \times 10 = 40 \text{ mm} ]$$

This calculation is rooted in the basic unit conversion within the metric system, where the prefix "centi-" denotes a hundredth of a base unit, and "milli-" signifies a thousandth. Since there are 10 millimeters in a centimeter, multiplying the number of centimeters by 10 directly converts the measurement to millimeters. This simple multiplication step reflects the decimal structure of the metric system, making it easy to switch between units of length by merely shifting the decimal point or, in cases like this, applying basic multiplication.

Now, for items that typically measure about 4 centimeters in length:

• USB Flash Drive

• Slim rectangular shape; contains electronic components encapsulated within a small plastic, metal, or rubber casing.
• Large Paperclip

• Made of steel wire bent to a looped shape; used to hold sheets of paper together.
• Key

• Metal object with a series of grooves and notches that fit the wards of a particular lock.
• Standard Matchstick

• Small wooden stick with a chemical head that ignites when struck against a suitable surface.
• Small Screwdriver (for electronics)

• Tool with a handle and a shaft, ending in a tip designed for screwing/unscrewing small screws, especially in electronic devices.
• House Key

• Similar to the key detailed previously but specifically designed for residential locks.
• Lip Balm Tube

• Cylindrical container for lip balm; the base twists to push the balm up for application.

Each of these items is commonly found in everyday settings, illustrating the practical dimension of 4 centimeters in a tangible, recognizable form.