Convert Mile per hour to Knot
1 mile per hour = 0.8689762 knot (kn). For example, 10 mile per hour = 8.689762 knot and 100 mile per hour = 86.89762 knot. Type any value below to convert mile per hour to knot both ways — it runs entirely in your browser.
Quick answer: Mile per hour to Knot
1 Mile per hour = 0.8689762 Knot (mph → kn). To convert mile per hour to knot, multiply by 0.8689762. To convert knot to mile per hour, multiply by 1.150779. The converter at the top does this instantly and both ways; the sections below give the formula, worked examples, a full conversion chart and answers to the most common mile per hour-to-knot questions.
How to convert Mile per hour to Knot
To convert mile per hour to knot, multiply the number of mile per hour by the conversion factor 0.8689762, because 1 mph = 0.8689762 kn. The conversion is linear, so the same factor works for any value — whole numbers, decimals or fractions. For the reverse direction, 1 kn = 1.150779 mph, so you divide by 0.8689762 (or multiply by 1.150779) to turn knot back into mile per hour.
kn = mph × 0.8689762 ·
mph = kn × 1.150779
- Write down the value you want to convert, in mile per hour.
- Multiply it by 0.8689762.
- The result is the same area/length/quantity expressed in knot.
Mile per hour to Knot — worked examples
Each row shows the exact arithmetic so you can follow the conversion step by step. For example, 5 mile per hour is 4.344881 knot because 5 mph × 0.8689762 = 4.344881 kn.
| Mile per hour | Calculation | Knot |
|---|---|---|
| 1 mph | 1 mph × 0.8689762 = 0.8689762 kn | 0.8689762 kn |
| 2 mph | 2 mph × 0.8689762 = 1.737952 kn | 1.737952 kn |
| 3 mph | 3 mph × 0.8689762 = 2.606929 kn | 2.606929 kn |
| 5 mph | 5 mph × 0.8689762 = 4.344881 kn | 4.344881 kn |
| 7 mph | 7 mph × 0.8689762 = 6.082834 kn | 6.082834 kn |
| 10 mph | 10 mph × 0.8689762 = 8.689762 kn | 8.689762 kn |
| 12 mph | 12 mph × 0.8689762 = 10.42771 kn | 10.42771 kn |
| 15 mph | 15 mph × 0.8689762 = 13.03464 kn | 13.03464 kn |
| 20 mph | 20 mph × 0.8689762 = 17.37952 kn | 17.37952 kn |
| 25 mph | 25 mph × 0.8689762 = 21.72441 kn | 21.72441 kn |
| 50 mph | 50 mph × 0.8689762 = 43.44881 kn | 43.44881 kn |
| 100 mph | 100 mph × 0.8689762 = 86.89762 kn | 86.89762 kn |
Common Mile per hour to Knot conversions
These are the mile per hour-to-knot values people look up most often. Every figure is computed from the exact factor, so you can rely on them for quick reference:
- 1 mile per hour = 0.8689762 knot
- 2 mile per hour = 1.737952 knot
- 2.5 mile per hour = 2.172441 knot
- 3 mile per hour = 2.606929 knot
- 4 mile per hour = 3.475905 knot
- 5 mile per hour = 4.344881 knot
- 6 mile per hour = 5.213857 knot
- 7 mile per hour = 6.082834 knot
- 8 mile per hour = 6.95181 knot
- 9 mile per hour = 7.820786 knot
- 10 mile per hour = 8.689762 knot
- 12 mile per hour = 10.42771 knot
- 15 mile per hour = 13.03464 knot
- 20 mile per hour = 17.37952 knot
- 25 mile per hour = 21.72441 knot
- 30 mile per hour = 26.06929 knot
- 50 mile per hour = 43.44881 knot
- 75 mile per hour = 65.17322 knot
- 100 mile per hour = 86.89762 knot
- 200 mile per hour = 173.7952 knot
- 500 mile per hour = 434.4881 knot
- 1000 mile per hour = 868.9762 knot
Mile per hour to Knot conversion chart (both directions)
The chart below converts mile per hour to knot and knot to mile per hour side by side, so it works whichever way you need. 1 mile per hour = 0.8689762 knot, and 1 knot = 1.150779 mile per hour.
| Mile per hour → Knot | Knot → Mile per hour |
|---|---|
| 0.25 mph = 0.2172441 kn | 0.25 kn = 0.2876949 mph |
| 0.5 mph = 0.4344881 kn | 0.5 kn = 0.5753897 mph |
| 1 mph = 0.8689762 kn | 1 kn = 1.150779 mph |
| 2 mph = 1.737952 kn | 2 kn = 2.301559 mph |
| 3 mph = 2.606929 kn | 3 kn = 3.452338 mph |
| 4 mph = 3.475905 kn | 4 kn = 4.603118 mph |
| 5 mph = 4.344881 kn | 5 kn = 5.753897 mph |
| 6 mph = 5.213857 kn | 6 kn = 6.904677 mph |
| 7 mph = 6.082834 kn | 7 kn = 8.055456 mph |
| 8 mph = 6.95181 kn | 8 kn = 9.206236 mph |
| 9 mph = 7.820786 kn | 9 kn = 10.35702 mph |
| 10 mph = 8.689762 kn | 10 kn = 11.50779 mph |
| 12 mph = 10.42771 kn | 12 kn = 13.80935 mph |
| 15 mph = 13.03464 kn | 15 kn = 17.26169 mph |
| 20 mph = 17.37952 kn | 20 kn = 23.01559 mph |
| 25 mph = 21.72441 kn | 25 kn = 28.76949 mph |
| 30 mph = 26.06929 kn | 30 kn = 34.52338 mph |
| 40 mph = 34.75905 kn | 40 kn = 46.03118 mph |
| 50 mph = 43.44881 kn | 50 kn = 57.53897 mph |
| 75 mph = 65.17322 kn | 75 kn = 86.30846 mph |
| 100 mph = 86.89762 kn | 100 kn = 115.0779 mph |
| 150 mph = 130.3464 kn | 150 kn = 172.6169 mph |
| 200 mph = 173.7952 kn | 200 kn = 230.1559 mph |
| 250 mph = 217.2441 kn | 250 kn = 287.6949 mph |
| 500 mph = 434.4881 kn | 500 kn = 575.3897 mph |
| 1000 mph = 868.9762 kn | 1000 kn = 1,150.779 mph |
Mile per hour vs Knot: which is bigger?
A knot is the larger unit: one knot equals 1.150779 mile per hours. Put another way, you need 1.150779 mile per hours to make a single knot.
What is a Mile per hour? History, origin and usage
The mile per hour expresses speed in imperial miles travelled each hour and is one of the oldest everyday speed units in the English-speaking world. It survives from the British imperial and US customary systems even where metric units rule elsewhere.
Miles per hour is the unit on road signs, speed limits and car speedometers in the United States, the United Kingdom and a handful of related territories. It is also common for reporting wind and storm speeds in those countries.
One mile per hour equals exactly 1.609344 kilometres per hour — the same exact factor that relates the mile to the kilometre. Although mph rules the road in the US and UK, both countries switch to knots at sea and in the air.
What is a Knot? History, origin and usage
The knot takes its name from the old “chip log”: a knotted rope tied to a wooden panel was let out behind a ship while a sand-glass timed it, and the number of knots that ran through the sailor’s fingers gave the speed. The knots were spaced so that this count equalled the ship’s speed in nautical miles per hour — a method accurate to within a fraction of a percent of the modern value.
One knot is one nautical mile per hour, and it remains the standard speed unit in maritime and aviation navigation and in meteorology for wind speed. Its convenience is that a nautical mile equals one minute of latitude, so speed in knots ties directly to position on a chart.
A knot is exactly 1.852 kilometres per hour, the nautical mile being fixed at 1,852 metres. The United States adopted this international definition in 1954 and the United Kingdom in 1970; US aviation moved to knots and nautical miles around 1969.
Convert 1 Mile per hour to other units
It can help to see a mile per hour next to the other units it is commonly compared with. One mile per hour (mph) is equal to:
| 1 Mile per hour equals | Unit |
|---|---|
| 0.44704 m/s | Metre per second |
| 1.609344 km/h | Kilometre per hour |
| 1.466667 ft/s | Foot per second |
| 44.704 cm/s | Centimetre per second |
| 447.04 mm/s | Millimetre per second |
| 0.8689762 kn | Knot |
Convert 1 Knot to other units
One knot (kn) is equal to:
| 1 Knot equals | Unit |
|---|---|
| 0.5144444 m/s | Metre per second |
| 1.852 km/h | Kilometre per hour |
| 1.150779 mph | Mile per hour |
| 1.68781 ft/s | Foot per second |
| 51.44444 cm/s | Centimetre per second |
| 514.4444 mm/s | Millimetre per second |
Tips for converting Mile per hour to Knot
- To go from mile per hour to knot, multiply by 0.8689762; to go back, divide by 0.8689762 (or multiply by 1.150779).
- For a quick mental estimate, remember that 1 mile per hour ≈ 0.8689762 knot, so 10 mile per hour ≈ 8.689762 knot.
- The converter above keeps full precision; the tables round for readability, so use the tool for exact figures.
- Both fields update live as you type — change either side to convert in that direction.
How to use this Mile per hour to Knot converter
Type a number into the Mile per hour field and the equivalent in Knot appears instantly — there is no “convert” button to press and nothing is sent to a server, so it works offline once the page has loaded and is safe for any data. You can also type into the Knot field to convert the other way (knot to mile per hour). Use the swap control to flip the two units, and copy the result with a single click. Because the calculation runs in your browser with full floating-point precision, the converter is more exact than the rounded figures shown in the reference chart above — use the chart for quick look-ups and the tool for precise work.
Accuracy and method
Every figure on this page — the formula, the worked examples, the conversion chart and the “convert to other units” tables — is computed from a single verified conversion factor (1 mph = 0.8689762 kn), never copied from a hand-typed lookup table that could drift. That factor is derived from each unit’s definition in terms of a common base unit, and an automated check re-verifies all of the site’s factors on every update, so the numbers here stay correct over time. This matters for mile per hour-to-knot conversions because a small rounding error in a published table compounds quickly at larger quantities; computing from the exact factor avoids that.
Sources
- NIST Special Publication 811 — Guide for the Use of the SI — publishes the exact metric equivalents of the customary units. The inch, foot, yard and mile are defined exactly in metres by the 1959 international yard-and-pound agreement, so every imperial figure on this page is exact, not rounded.
- BIPM — The International System of Units (SI Brochure) — the defining document for the SI, published by the International Bureau of Weights and Measures. It fixes the base unit that this conversion resolves to, which is why the factor here can be exact rather than approximate.
All speed factors are exact: 1 m/s = 3.6 km/h, 1 mph = 1.609344 km/h, 1 knot = 1.852 km/h, 1 ft/s = 0.3048 m/s. So the live tool and every number on this page always agree.
Frequently asked questions
- How many knot are in 1 mile per hour?
- 1 mile per hour = 0.8689762 knot (kn). To convert any number of mile per hour to knot, multiply by 0.8689762.
- How do I convert mile per hour to knot?
- Multiply the number of mile per hour by 0.8689762. For example, 10 mile per hour = 10 × 0.8689762 = 8.689762 knot, and 25 mile per hour = 21.72441 knot.
- How many mile per hour are in 1 knot?
- 1 knot = 1.150779 mile per hour. So to convert knot back to mile per hour, multiply by 1.150779.
- What is the formula to convert mile per hour to knot?
- knot = mile per hour × 0.8689762. The reverse formula is mile per hour = knot × 1.150779.
- How much is 100 mile per hour in knot?
- 100 mile per hour = 86.89762 knot. (And 1000 mile per hour = 868.9762 knot.)
- Which is bigger, a mile per hour or a knot?
- A knot is larger: 1 knot = 1.150779 mile per hour.
- Is this mile per hour to knot converter accurate?
- Yes — every value is computed from the exact 0.8689762 kn per mph factor (not rounded look-up tables), and the factors are re-verified automatically on every update.
- Can I convert knot to mile per hour too?
- Yes. The converter works both ways — enter a value in either field. 1 knot = 1.150779 mile per hour.