Convert Knots to Miles per Hour
Convert Knots to Miles per Hour instantly. 1 Knot (kn) equals 1.1508 Miles per Hour (mph).
Knots to Miles per Hour conversion table
| Knots (kn) | Miles per Hour (mph) |
|---|---|
| 1 kn | 1.1508 mph |
| 2 kn | 2.3016 mph |
| 3 kn | 3.4523 mph |
| 5 kn | 5.7539 mph |
| 10 kn | 11.5078 mph |
| 20 kn | 23.0156 mph |
| 50 kn | 57.539 mph |
| 100 kn | 115.0779 mph |
| 500 kn | 575.3897 mph |
| 1,000 kn | 1,150.78 mph |
1 Knot = 1.1508 Miles per Hour · multiply Knots by 1.1508
About converting Knots to Miles per Hour
Knots (kn) and Miles per Hour (mph) are both units of speed, so converting between them is a single multiplication: multiply your Knots figure by 1.1508. Ten Knots comes to 11.5078 Miles per Hour, and a hundred works out at 115.0779 Miles per Hour.
Rule of thumb: going from Knots to Miles per Hour multiplies, so the figure always grows — one Knot is already 1.1508 Miles per Hour. If your answer came out smaller, you have the conversion the wrong way round.
What is a Knot?
The knot is one nautical mile per hour, and it is the speed unit of ships and aircraft worldwide no matter what the countries underneath use on their roads. The name is entirely literal: sailors measured speed with a chip log — a weighted board on a rope with knots tied at regular intervals, thrown over the stern and paid out for a fixed time while someone counted the knots running through their hands. It survives because it pairs with the nautical mile, which is one minute of latitude, so speed and chart distance share a ruler. One warning: "knots per hour" is simply wrong. The per-hour is already inside the word.
What is a Mile per Hour?
Miles per hour is the road-speed unit that refused to die. It is posted on the signs and printed on the speedometers of the United States and the United Kingdom, two countries that otherwise use metric for most scientific and industrial work — a split that leaves British drivers buying fuel in litres while measuring their speed in miles. It has a second life in the media of both countries, where wind gusts, pitch speeds and tennis serves are quoted in mph out of pure habit rather than for any technical reason.
To put both in perspective: a cruising airliner does around 470 knots, while a US interstate limit is typically 65 to 75 miles per hour.
The converter above updates as you type, and the table lists common values for quick reference. Need the opposite direction? Use the Miles per Hour to Knots converter, or browse all Speed converters.
Frequently asked questions
How many Miles per Hour are in one Knot?
There are 1.1508 Miles per Hour in one Knot.
How do I convert Knots to Miles per Hour?
Multiply the number of Knots by 1.1508. For example, 10 Knots = 11.5078 Miles per Hour.
What is 100 Knots in Miles per Hour?
100 Knots is equal to 115.0779 Miles per Hour.
How do I convert Miles per Hour to Knots?
Multiply the Miles per Hour value by 0.869 (or divide by 1.1508).
Is this Knots to Miles per Hour conversion exact?
The definition is exact — Knots and Miles per Hour are both fixed against the same base by international agreement — but the decimal shown here is rounded for readability, because the true ratio does not terminate. For engineering or scientific work, carry more decimal places than this page displays.
What is a Knot?
The knot is one nautical mile per hour, and it is the speed unit of ships and aircraft worldwide no matter what the countries underneath use on their roads. The name is entirely literal: sailors measured speed with a chip log — a weighted board on a rope with knots tied at regular intervals, thrown over the stern and paid out for a fixed time while someone counted the knots running through their hands. It survives because it pairs with the nautical mile, which is one minute of latitude, so speed and chart distance share a ruler. One warning: "knots per hour" is simply wrong. The per-hour is already inside the word.
What is a Mile per Hour?
Miles per hour is the road-speed unit that refused to die. It is posted on the signs and printed on the speedometers of the United States and the United Kingdom, two countries that otherwise use metric for most scientific and industrial work — a split that leaves British drivers buying fuel in litres while measuring their speed in miles. It has a second life in the media of both countries, where wind gusts, pitch speeds and tennis serves are quoted in mph out of pure habit rather than for any technical reason.