How to Use the Length Converter

Enter a length or distance, select the unit you are converting from and then choose the unit you want to convert to. The result updates automatically.

You can also use the swap button to reverse the conversion instantly.

The converter supports:

• Nanometres (nm);
• micrometres (µm);
• millimetres (mm);
• centimetres (cm);
• metres (m);
• kilometres (km);
• inches (in);
• feet (ft);
• yards (yd);
• miles (mi); and
• nautical miles (nmi).

Metric Length Units

The metric system is based on powers of ten, which makes conversions between metric units relatively straightforward.

Length Conversion Table

How to Convert Metres to Centimetres

There are 100 centimetres in one metre.

For example:

How to Convert Centimetres to Metres

For example:

How to Convert Millimetres to Metres

One metre contains 1,000 millimetres.

For example:

How to Convert Metres to Millimetres

For example:

How to Convert Kilometres to Metres

For example:

How to Convert Kilometres to Miles

One kilometre is approximately 0.621371 miles.

For example:

How to Convert Miles to Kilometres

One international mile equals exactly 1.609344 kilometres.

For example:

How to Convert Inches to Centimetres

One international inch equals exactly 2.54 centimetres.

For example:

How to Convert Centimetres to Inches

For example:

How to Convert Feet to Metres

One international foot equals exactly 0.3048 metres.

For example:

How to Convert Metres to Feet

For example:

How to Convert Feet to Centimetres

For example:

How to Convert Yards to Metres

One international yard equals exactly 0.9144 metres.

For example:

How Many Feet Are in a Yard?

Therefore:

How Many Inches Are in a Foot?

Therefore:

How Many Feet Are in a Mile?

How Many Yards Are in a Mile?

What Is a Nautical Mile?

A nautical mile is a unit commonly used in maritime and aviation navigation.

A nautical mile is longer than a standard international mile.

Metric vs Imperial Length Units

Australia primarily uses the metric system for official measurements, including metres and kilometres.

Imperial and US customary units such as feet, inches, yards and miles can still appear in product specifications, imported equipment, screen sizes, aviation and international information.

A length converter can therefore be useful when comparing measurements from different systems.

Length Converter for Construction

Length conversions are frequently useful for building and renovation projects, particularly where plans or products use different measurement systems.

Common conversions include:

• Millimetres to metres;
• metres to millimetres;
• feet to metres;
• inches to millimetres;
• inches to centimetres; and
• yards to metres.

Length Converter for Height

Height can commonly be expressed in centimetres or feet and inches.

For example:

A decimal result in feet is not automatically the same as feet-and-inches notation. For example, 5.5 feet means 5 feet 6 inches because 0.5 × 12 = 6.

Length Converter for Travel and Distance

Kilometres and miles are commonly converted when comparing distances, vehicle information or travel routes between countries.

Australia uses kilometres for road distances, while miles are still widely used in countries such as the United States.

Length Converter Assumptions

This converter uses standard international unit definitions, including:

• 1 inch = 0.0254 metres;
• 1 foot = 0.3048 metres;
• 1 yard = 0.9144 metres;
• 1 international mile = 1,609.344 metres;
• 1 nautical mile = 1,852 metres;
• 1 kilometre = 1,000 metres;
• 1 centimetre = 0.01 metres; and
• 1 millimetre = 0.001 metres.

Displayed results may be rounded for readability, while calculations use the full conversion factors defined in the calculator.

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