Distance Converter
Convert kilometres, miles, metres, feet, and more.
- km
- miles
- distance
- length
About Distance Converter
Distance and length are the most converted measurements in everyday life — kilometres to miles for a road trip, metres to feet for a piece of furniture, inches to centimetres for a screen, nautical miles for ships and aircraft. The trickiest pairings are the ones where the two units are close but not equal (a metre is a bit longer than a yard, a kilometre is a bit shorter than a mile), because eyeballing the answer rarely lands within the margin you need.
This converter shows your input expressed in every common length unit at once: kilometres, metres, centimetres, millimetres, miles, yards, feet, inches, and nautical miles. The conversion factors are the exact international definitions (1 inch = 25.4 mm, 1 nautical mile = 1852 m), so the values match official references.
How to use
Enter a value into the input at the top and pick the unit from the dropdown. The conversions panel updates instantly with the value in each other unit, with a copy button on every row.
Tap any row in the conversions list to switch the input to that unit — the displayed value stays the same numerically, but the source unit changes. This is handy for chaining conversions (e.g. inches → centimetres → metres) without retyping. The URL reflects the current value and unit so you can link to a specific conversion.
Frequently asked questions
How many miles is one kilometre?
One kilometre is approximately 0.62137 miles, or one mile is exactly 1.609344 kilometres. A common mental shortcut is to multiply km by 6 and divide by 10 (so 10 km ≈ 6 miles, 100 km/h ≈ 60 mph) — accurate to within 4% for any distance.
How long is one inch in centimetres?
Exactly 2.54 centimetres, by definition. The inch has been formally defined as 2.54 cm by international agreement since 1959, so this is a fixed conversion factor, not an approximation.
What is a nautical mile, and why is it different from a regular mile?
A nautical mile is 1,852 metres — roughly 15% longer than a statute (regular) mile of 1,609 metres. It was originally defined as one minute of arc of latitude along any meridian, which makes it a natural unit for navigation: one knot is one nautical mile per hour, and one degree of latitude is exactly 60 nautical miles.
How tall is a person in metres if they're 5' 10"?
5 feet 10 inches is 70 inches, which is 177.8 cm or 1.778 m. Most adults are between 1.50 m and 2.00 m tall. To convert your own height from feet/inches: multiply feet by 12, add inches, multiply by 2.54 — the result is your height in centimetres.