Knot to Mile/h Converter
Enter the value that you want to convert knot (kt) to mile/h (mi/h) or mile/h to knot.Also written as KT to MI/H conversion.
1 knot = 1.1507794 mile/h
Formula: mile/h = knot value × 1.1507794
KT to MI/H — knot to mile/h
10 knot = 11.50779 mile/h
Popular Speed Converters:
Converting Knot to Mile/h
Understanding the Knot
The knot (1 nautical mile per hour) is the universal speed unit for maritime navigation and aviation worldwide.
One knot equals exactly 1.852 km/h or 1.15078 mph. The name comes from the historical practice of measuring ship speed by counting knots on a rope pulled overboard. All aircraft airspeed indicators display in knots, air traffic control communicates in knots, and nautical charts are designed around the nautical mile. Tropical storm wind speeds are officially reported in knots.
The Mile/h Explained
The mile per hour (mph) is the standard speed unit for road transport in the United States, United Kingdom, and a few other countries.
US speed limits range from 25 mph in residential areas to 85 mph on some Texas highways. In motorsport, NASCAR top speeds exceed 200 mph, and Indy cars reach 240 mph. The UK uses mph for all road signs despite otherwise adopting metric. Baseball pitch speeds and hurricane categories are also measured in mph.
Speed Unit Conversions
Speed units vary by transport mode and country. Automobiles use km/h in most countries but mph in the US and UK. Aviation uses knots worldwide. Shipping uses knots for surface speed. Physics calculations require meters per second. Wind speeds appear in km/h, mph, knots, or Beaufort scale depending on the meteorological service. Sports timing uses m/s for track events but km/h or mph for ball speeds.
knot to mile/h metric conversion table
| 0.01 kt | = | 0.01151 mi/h |
| 0.1 kt | = | 0.11508 mi/h |
| 1 kt | = | 1.15078 mi/h |
| 2 kt | = | 2.30156 mi/h |
| 3 kt | = | 3.45234 mi/h |
| 4 kt | = | 4.60312 mi/h |
| 5 kt | = | 5.75390 mi/h |
| 6 kt | = | 6.90468 mi/h |
| 7 kt | = | 8.05546 mi/h |
| 8 kt | = | 9.20624 mi/h |
| 9 kt | = | 10.35702 mi/h |
| 10 kt | = | 11.50779 mi/h |
| 11 kt | = | 12.65857 mi/h |
| 12 kt | = | 13.80935 mi/h |
| 13 kt | = | 14.96013 mi/h |
| 14 kt | = | 16.11091 mi/h |
| 15 kt | = | 17.26169 mi/h |
| 16 kt | = | 18.41247 mi/h |
| 17 kt | = | 19.56325 mi/h |
| 18 kt | = | 20.71403 mi/h |
| 19 kt | = | 21.86481 mi/h |
| 20 kt | = | 23.01559 mi/h |
| 30 kt | = | 34.52338 mi/h |
| 40 kt | = | 46.03118 mi/h |
| 50 kt | = | 57.53897 mi/h |
| 60 kt | = | 69.04677 mi/h |
| 70 kt | = | 80.55456 mi/h |
| 80 kt | = | 92.06236 mi/h |
| 90 kt | = | 103.57015 mi/h |
| 100 kt | = | 115.07794 mi/h |
| 200 kt | = | 230.15589 mi/h |
| 300 kt | = | 345.23383 mi/h |
| 400 kt | = | 460.31178 mi/h |
| 500 kt | = | 575.38972 mi/h |
| 600 kt | = | 690.46767 mi/h |
| 700 kt | = | 805.54561 mi/h |
| 800 kt | = | 920.62356 mi/h |
| 900 kt | = | 1035.70150 mi/h |
| 1000 kt | = | 1150.77945 mi/h |
How to Convert KT to MI/H (Knot to Mile/h)?
We can convert knot to mile/h by using an example.
Example:
Convert 20 Knot to Mile/h?
We know 1 Knot = 1.1507794 mile/h; 1 Mile/h = 0.8689762 knot.
20 knot = ___mi/h
20 × 1.1507794 = 23.01559 mi/h (we know 1 knot = 1.1507794 mile/h)
Answer:
20 knot = 23.01559 mile/h
How to Convert Knots to mph (Step-by-Step)
Converting knots to miles per hour is important for sailors checking weather forecasts, pilots communicating speeds, and anyone tracking tropical storms. One knot equals 1.15078 mph.
- Write down the speed value in knots.
- Multiply the knot value by 1.15078.
- The result is the equivalent speed in miles per hour (mph).
- For a quick estimate, add about 15% to the knot value.
Common Knots to mph Conversions
Reference table covering typical wind and vessel speeds in knots with their mph equivalents.
| Knot | Mile/h |
|---|---|
| 5 knots | 5.75 mph |
| 12 knots | 13.81 mph |
| 25 knots | 28.77 mph |
| 34 knots | 39.12 mph |
| 64 knots | 73.65 mph |
| 96 knots | 110.47 mph |
| 137 knots | 157.66 mph |
| 250 knots | 287.70 mph |
| 500 knots | 575.39 mph |
Solved Examples: Knots to mph
Question 1: A sailing wind is reported at 12 knots. What is this in mph?
Solution:
Formula: mph = knots × 1.15078
= 12 × 1.15078
= 13.81 mph
Answer: 12 knots = 13.81 mph (a pleasant sailing breeze)
Question 2: An aircraft is traveling at 250 knots. Convert to mph.
Solution:
mph = knots × 1.15078
= 250 × 1.15078
= 287.70 mph
Answer: 250 knots = 287.70 mph
Question 3: A Category 5 hurricane has winds of 137 knots. What is this in mph?
Solution:
mph = knots × 1.15078
= 137 × 1.15078
= 157.66 mph
Answer: 137 knots = 157.66 mph (devastating wind speeds)
Question 4: Convert 40 knots (small craft advisory) to mph.
Solution:
mph = knots × 1.15078
= 40 × 1.15078
= 46.03 mph
Answer: 40 knots = 46.03 mph
Practice Questions
Try solving these on your own to test your understanding:
- Convert 15 knots to mph. (Answer: 17.26 mph)
- A boat travels at 30 knots. What is its speed in mph? (Answer: 34.52 mph)
- Hurricane-force winds start at 64 knots. Convert to mph. (Answer: 73.65 mph)
- An aircraft approach speed is 140 knots. What is this in mph? (Answer: 161.11 mph)
- Convert 8 knots (kayaking speed) to mph. (Answer: 9.21 mph)
Why Aviation and Maritime Use Knots
Aviation adopted knots because air navigation is based on latitude and longitude. One nautical mile equals one minute of latitude, making distance calculations on charts intuitive. If an aircraft flies at 120 knots for 1 hour, it covers 120 nautical miles or 2 degrees of latitude. This direct relationship between speed, time, and angular distance on the Earth's surface simplifies flight planning enormously. All METAR weather reports, NOTAMs, and air traffic control communications worldwide use knots for wind and aircraft speed.
Beaufort Wind Scale
The Beaufort scale relates wind speed to observed conditions at sea: Force 0 (calm, <1 knot), Force 3 (gentle breeze, 7-10 knots/8-12 mph), Force 6 (strong breeze, 22-27 knots/25-31 mph), Force 8 (gale, 34-40 knots/39-46 mph), Force 10 (storm, 48-55 knots/55-63 mph), and Force 12 (hurricane, >64 knots/>74 mph). The Saffir-Simpson hurricane scale starts where Beaufort ends: Category 1 at 64-82 knots (74-95 mph) up to Category 5 at 137+ knots (157+ mph).
Saffir-Simpson Hurricane Scale in Both Units
Category 1: 64-82 knots (74-95 mph) — minimal damage to roofs and trees. Category 2: 83-95 knots (96-110 mph) — extensive damage, near-total power loss. Category 3: 96-112 knots (111-129 mph) — devastating damage, major structural issues. Category 4: 113-136 knots (130-156 mph) — catastrophic damage, areas uninhabitable for weeks. Category 5: 137+ knots (157+ mph) — total destruction of framed homes. The National Hurricane Center uses knots internally but reports mph to the US public.
Key Takeaways
- Multiply knots by 1.15078 to get mph.
- Quick estimate: add about 15% to the knot value.
- Hurricane force starts at 64 knots = 74 mph.
- Aviation uses knots because 1 nautical mile = 1 minute of latitude.
- Typical commercial jets cruise at 450-500 knots (518-575 mph).
- The Beaufort scale bridges everyday observation and knot measurements.
Knot to Mile/h Conversion Formula
mile/h = knot × 1.1507794
1 knot = 1.1507794 mile/h
1 mile/h = 0.8689762 knot
Reverse: knot = mile/h × 0.8689762
Frequently Asked Questions
How many mile/h are in 1 knot?
There are 1.1507794 mile/h in 1 knot. To convert knot to mile/h, multiply the value by 1.1507794.
How do I convert knot to mile/h?
Multiply your knot value by 1.1507794 to get the equivalent in mile/h. For example, 5 knot = 5 × 1.1507794 = 5.75390 mile/h.
How do I convert mile/h to knot?
Multiply your mile/h value by 0.8689762 to get the equivalent in knot. Alternatively, divide by 1.1507794.
What is 10 knot in mile/h?
10 knot is equal to 11.50779 mile/h.
What is 100 knot in mile/h?
100 knot is equal to 115.07794 mile/h.