Kilometers to Miles (km to mi) Converter

Kilometers to Miles

Converting kilometers to miles is essential when travelling to countries that use imperial measurements, understanding speed limits, or dealing with vehicles from different markets.

One kilometre equals about 0.621371 miles. For quick mental math, multiply km by 0.6 or divide by 1.6.

When You Need This

Travelling to US/UK

Road signs and speed limits there are posted in miles per hour.

Understanding Speed

Convert km/h to mph to compare driving speeds across regions.

Car Imports

Vehicles from metric countries have km/h speedometers — translate to mph.

How to Use This Converter

Enter kilometres

Type the km value in the top field. Miles appear instantly below.

Read miles

The result updates live to 8 decimal places using the exact factor.

Copy or swap

Copy for navigation apps, or swap to convert miles back to km.

Conversion Formula

miles = km × 0.621371 • Reverse: km = miles × 1.609344. Example: 100 km/h ≈ 62 mph.

Speed Limits Compared

Setting	km/h	mph
City driving	50 km/h	31 mph
Highway	100 km/h	62 mph
Fast highway	120 km/h	75 mph
Autobahn advisory	130 km/h	81 mph

Features

Instant As-You-Type Results

The result updates the moment you enter a number — no button to press, no page reload.

One-Click Swap

The swap button between the two fields reverses the direction instantly, so you can convert back without retyping.

Copy Without the Unit

Each field has its own copy button that grabs only the number, ready to paste into forms, spreadsheets, or documents.

Searchable Unit Picker

Each dropdown has a search box — switch to any other length unit and use it as a general-purpose converter.

Driving & Distance

Speed Conversion

The same factor converts speed: 100 km/h = 62 mph, 130 km/h = 81 mph (Autobahn advisory).

Distance Sense

1 km = 0.62 miles (a 12–15 minute walk); 100 km = 62 miles, roughly an hour's drive.

Travel companion, fully private. Perfect on mobile while abroad — no login, no tracking, and all maths happens in your browser.

Frequently Asked Questions

How fast is 100 km/h in mph?

100 km/h equals about 62 mph — a common highway speed limit in many metric countries.

Which countries use miles instead of kilometres?

Only the United States, the United Kingdom, and a few smaller territories (Myanmar, Liberia) use miles for road distances. The UK uniquely uses miles for roads but litres for fuel.

How do I convert my car's speedometer?

Many modern cars can switch display units in the settings. Older cars may need a cluster swap or overlay; some navigation apps can show speed in either unit as a workaround.

Is 1 km equal to half a mile?

Not exactly. 1 km = 0.62 miles, slightly more than half. Half a mile is 0.8 km. The estimate "1 km ≈ 0.6 miles" is close enough for most uses.

What's the fastest legal speed limit in km/h?

Germany's Autobahn has unrestricted sections, though 130 km/h (81 mph) is advisory. The highest posted limit elsewhere is 160 km/h (99 mph) in the UAE.

Kilometers to Miles