knots to mph converter

A knot is one nautical mile per hour — 1.1508 mph or 1.852 km/h, both exact. This converts wind, boat and aircraft speeds either way.

Miles per hour

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Miles per hour—
Kilometres per hour—
Metres per second—
Knots—

Knots to miles per hour

KnotsMiles per hour
1 kn1.1508 mph
5 kn5.7539 mph
10 kn11.5078 mph
15 kn17.2617 mph
20 kn23.0156 mph
25 kn28.7695 mph
30 kn34.5234 mph
34 kn39.1265 mph
40 kn46.0312 mph
48 kn55.2374 mph
50 kn57.539 mph
64 kn73.6499 mph
75 kn86.3085 mph
100 kn115.0779 mph
150 kn172.6169 mph
250 kn287.6949 mph
450 kn517.8508 mph
500 kn575.3897 mph

Miles per hour to knots

Miles per hourKnots
5 mph4.3449 kn
10 mph8.6898 kn
20 mph17.3795 kn
30 mph26.0693 kn
40 mph34.759 kn
50 mph43.4488 kn
60 mph52.1386 kn
74 mph64.3042 kn
100 mph86.8976 kn
150 mph130.3464 kn
200 mph173.7952 kn
300 mph260.6929 kn
500 mph434.4881 kn
600 mph521.3857 kn

Related calculators

Length Weight Temperature Volume Area Speed

One nautical mile per hour

A knot is one nautical mile (exactly 1,852 m) per hour, so 1 knot = 1.852 km/h = 1.150779 mph. The name comes from the knotted line sailors paid out behind a ship to time its speed. Knots survive in shipping, aviation and meteorology because the nautical mile matches a minute of latitude on a chart, so speed in knots and distance in nautical miles add up directly on a plot. See the nautical miles to miles converter for distances.

miles per hour = knots × 1.150779448   |   knots = miles per hour ÷ 1.150779448

Wind and aircraft reference points

On the Beaufort scale a fresh breeze is 17–21 knots (20–24 mph), a gale starts at 34 knots (39 mph), storm force at 48 knots (55 mph) and hurricane force at 64 knots (74 mph). An airliner cruises around 450–500 knots (520–575 mph). To go from knots to mph in your head, add 15%.

Frequently asked questions

How many miles per hour are in 1 knot?
One knot is 1.1508 miles per hour — an exact figure, because both units are pinned to the same definition.
What is 20 knots in miles per hour?
20 knots is 23.0156 miles per hour.
How do I convert knots to miles per hour?
Multiply by 1.150779448. To go back, divide miles per hour by 1.150779448. The calculator does both directions and shows the working under the result.
How many knots are in 1 mile per hour?
One mile per hour is 0.868976 knots.
Is a knot faster than a mile per hour?
Yes, by about 15%: 1 knot is 1.1508 mph, because a nautical mile (1,852 m) is longer than a statute mile (1,609 m).

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