A knot is one nautical mile per hour. A nautical mile (1,852 metres) is based on the Earth’s geometry, which makes knots convenient for navigation. They are the standard speed unit in aviation, shipping and meteorology.

How many mph is 10 knots?

10 knots is about 11.51 miles per hour. Some handy values: 5 knots ≈ 5.75 mph, 20 knots ≈ 23.02 mph and 100 knots ≈ 115.08 mph. The converter shows the exact value for any figure you enter.

Why is a speed in mph higher than the same speed in knots?

Because a nautical mile is longer than a statute mile, one knot covers more distance than one mph. So a given speed is a larger number in mph than in knots — one knot is about 1.151 mph.

When should I convert knots to mph?

It is common in sailing, boating, aviation and weather, where a speed reported in knots needs to be read in miles per hour — for example a wind speed or a flight speed for a US/UK audience.

Can this tool convert mph back to knots?

Yes. Tap the ⇄ swap button to reverse the direction and convert miles per hour to knots (multiply by 0.868976). You can also pick any other speed unit from the dropdown, since this page runs on our full Mega Speed Converter.

Does the converter update live and work on mobile?

Yes. The mph result recalculates instantly as you type — there is no submit button — and the layout adapts to phones. A ready-made knots-to-miles-per-hour table is included for the most common values.

Knots to Miles per Hour Converter

Convert knots to miles per hour instantly. A knot is one nautical mile per hour, and because a nautical mile (1,852 m) is longer than a statute mile (1,609.344 m), one knot is about 1.15078 miles per hour. So to go from knots (kn) to miles per hour (mph) you multiply by 1.15078 — for example, 10 knots ≈ 11.51 mph and 2…

VALUE & FROM

1.1507794

1 knot = 1.1507794 mile per hour · 1 knot = 1.1507794 mile per hour

1 knot IN EVERY UNIT

METRIC

IMPERIAL / US

NAUTICAL

PHYSICS

HISTORICAL & FUN

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HOW TO USE

1
Enter the speed in knots (kn) in the value box — the converter defaults to knots → mph.
2
Read the mile-per-hour (mph) result instantly, or do it by hand: multiply the knots by 1.15078.
3
Use the knots-to-mph table below for common values, or tap ⇄ to convert miles per hour back to knots.
4
Need another unit? Pick any of the 21 speed units in the dropdown, then Share or Embed your conversion.

QUICK REFERENCE

1 km/h

0.621371 mph

1 mph

1.609344 km/h

1 m/s

3.6 km/h

1 m/s

2.23694 mph

1 knot

1.852 km/h

1 knot

1.15078 mph

1 mph

1.46667 ft/s

1 Mach

1,225.04 km/h

1 mi/s

3,600 mph

1 ft/s

0.681818 mph

ABOUT SPEED UNITS

Speed is distance divided by time, and its SI unit is the metre per second (m/s). The two most common everyday units are the kilometre per hour (km/h) and the mile per hour (mph): one metre per second is exactly 3.6 km/h and about 2.237 mph, while 1 km/h is about 0.621 mph. At sea and in the air, speed is measured in knots — one knot is one nautical mile per hour, or exactly 1.852 km/h. Very high speeds use the Mach number, the ratio of an object's speed to the local speed of sound; at sea level in standard conditions that is about 340.29 m/s (1,225 km/h), but it falls as air gets colder or thinner, so Mach 1 is not a fixed speed. The ultimate limit is the speed of light in a vacuum, exactly 299,792,458 m/s. Every unit here is stored as its exact number of metres per second, so any conversion is just the input turned into m/s and then into the target unit. Note that running or cycling pace (minutes per kilometre or per mile) is the reciprocal of speed rather than a linear unit, so it is handled by a separate pace calculator and is not part of this tool.

FREQUENTLY ASKED QUESTIONS

Multiply the number of knots by 1.15078 (or divide by 0.868976). This follows from a nautical mile being longer than a statute mile. For example, 50 knots × 1.15078 ≈ 57.54 mph. The converter does this instantly.

Formula: mph = knots × 1.15078.
A nautical mile is longer than a statute mile.
50 kn ≈ 57.54 mph; 25 kn ≈ 28.77 mph.
To reverse it, multiply mph by 0.868976.

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Last updated: — · 21 speed units · Exact SI, imperial & nautical definitions · Verified by the EagleCalculator team · Eagle-eyed accuracy for every calculation.