Convert kilometers to millimeters

Accurate tool to convert between km and mm

Length

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Kilometers

The kilometer is a unit of length equal to one thousand meters.

Millimeters

The millimeter is a unit of length in the metric system equal to one thousandth of a meter.

Formula

To convert from kilometers to millimeters, multiply the length by 1,000,000.

kilometers (km)

Description

The kilometer is a unit of length equal to one thousand meters.

History

Part of the original metric system adopted in France in the 1790s.

Symbol Origin

From 'kilo' (thousand) and 'meter'.

Usage Context

The standard unit for road distances and speed limits in most of the world.

Main Usage

International use

Did you know?

A kilometer is about 0.62 miles. It takes about 10-12 minutes to walk a kilometer at a moderate pace.

millimeters (mm)

Description

The millimeter is a unit of length in the metric system equal to one thousandth of a meter.

History

Defined in 1795 as part of the metric system numbering, based on one ten-millionth of the distance from the equator to the North Pole.

Symbol Origin

Derived from 'milli' (thousandth) and 'meter'.

Usage Context

Commonly used in engineering, manufacturing, and for measuring small objects like rain, screws, or paper thickness.

Main Usage

International use

Did you know?

A standard credit card is about 0.76 mm thick.

Quick Conversion Table

kilometers (km) millimeters (mm)
1 1,000,000
2 2,000,000
5 5,000,000
10 10,000,000
25 25,000,000
50 50,000,000
100 100,000,000
500 500,000,000
1000 1,000,000,000
2500 2,500,000,000
5000 5,000,000,000
10000 10,000,000,000

Frequently Asked Questions

How to convert kilometers to millimeters?

To convert from kilometers to millimeters, multiply the length by 1,000,000.

How many millimeters in 1 kilometers?

1 kilometers is equal to 1,000,000 millimeters.

What is a kilometers?

The kilometer is a unit of length equal to one thousand meters.

What is a millimeters?

The millimeter is a unit of length in the metric system equal to one thousandth of a meter.