ArchSupply Utilities

Mile to Kilometer Converter

Instant, two-way conversion across common engineering units.

Free

1 mi = 1.609344 km(Mile → Kilometre)

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Converting miles to kilometers

To convert miles to kilometers, multiply the value by 1.609344. Length values feed directly into setting out, spans and drawing dimensions, so the converter keeps full decimal precision in both directions.

Visual scale

To scale
1 mile = 1.609344 kilometers.
1 kilometer = 0.62137119 miles.

Mile (mi)

The mile (mi) is the imperial long-distance unit, equal to 5,280 feet.

Origin
Descended from the Roman mille passus but lengthened by later English statute, and fixed at exactly 1,609.344 m.
Where it is used
Used for road distance, transport planning and site context in the US and UK.
Relation to SI
1 mi = 1,609.344 m exactly.

Kilometer (km)

The kilometer (km) equals one thousand meters and measures geographic distance.

Origin
A decimal multiple of the SI meter.
Where it is used
Used for infrastructure alignment, transport planning, site context and mapping distances.
Relation to SI
1 km = 1,000 m exactly.

Frequently asked questions

How many kilometers are in one mile?

1 mi equals 1.609344 km.

How do I convert miles to kilometers?

Multiply the value by 1.609344. For example, 10 mi equals 16.09344 km.

How do I convert back from kilometers to miles?

1 km equals 0.62137119 mi. The converter above works in both directions, so you can type into either field.

Should I work in millimeters or meters on drawings?

Most architectural and structural drawings outside the US are dimensioned in millimeters to avoid decimal points, while site levels, grids and areas are stated in meters.

Are the imperial values here exact?

Yes. The inch has been defined as exactly 25.4 mm since 1959, so foot, yard and mile conversions are exact rather than rounded.

Is this length converter free to use?

Yes. Every unit conversion runs in your browser, needs no account and is free for professional use.

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