Need to convert speed from one unit to another? Our free Speed Converter makes it quick and easy. Enter a speed, choose the unit you are converting from and the unit you want, and get the converted result instantly. It supports common speed units such as kilometers per hour, miles per hour, meters per second, knots, and feet per second. It is useful for driving, travel, running, cycling, aviation, sports, schoolwork, and everyday calculations.
How to Use the Speed Converter
Using the Speed Converter is simple. Enter a speed, select the original unit, choose the unit you want, and click Convert.
- Enter a speed value.
- Select the unit under From.
- Select the unit under To.
- Click Convert.
- The converted speed will appear in the result box.
For example, enter 100, select Kilometer per Hour (km/h) as the From unit, and Mile per Hour (mph) as the To unit.
The result will be approximately:
100 km/h = 62.137119 mph
You can enter whole numbers or decimal values.
What Is Speed?
Speed tells us how quickly something is moving.
It describes the distance traveled over a certain amount of time.
For example, if a car travels 100 kilometers in one hour, its average speed is:
100 km/h
Different countries and industries use different units to describe speed, which is why speed conversion can be useful.
Common Speed Units
The Speed Converter supports several commonly used speed units:
- Kilometer per hour (km/h)
- Mile per hour (mph)
- Meter per second (m/s)
- Knot (kn)
- Foot per second (ft/s)
- Foot per minute (ft/min)
- Meter per minute (m/min)
These units can be used for driving, sports, science, aviation, engineering, and other everyday measurements.
Kilometers per Hour
Kilometers per hour, written as km/h, is one of the most common speed units in countries that use the metric system.
It is commonly used for:
- Road speed limits
- Car and motorcycle speeds
- Cycling
- Running
- Travel
For example:
60 km/h
means an object travels 60 kilometers in one hour at that speed.
Miles per Hour
Miles per hour, written as mph, is commonly used for speed measurements in the United States and some other countries.
For example:
60 mph
means traveling 60 miles in one hour at that speed.
One mile is longer than one kilometer, so the numerical value in mph is different from the value in km/h.
Meters per Second
Meters per second, written as m/s, is an important unit in science and physics.
It measures how many meters an object travels in one second.
For example:
10 m/s
means an object is moving at 10 meters per second.
Meters per second is often used in scientific calculations because it is part of the International System of Units (SI).
Knots
A knot, written as kn, is a unit of speed commonly used in aviation and marine navigation.
One knot is equal to one nautical mile per hour.
For example:
10 knots
means traveling at 10 nautical miles per hour.
Knots are commonly used for ships, boats, aircraft, wind speed, and weather information.
Feet per Second
Feet per second, written as ft/s, measures how many feet are traveled in one second.
It can be used in physics, engineering, sports, and other technical measurements.
For example:
10 ft/s
means traveling 10 feet every second.
Feet per Minute
Feet per minute, written as ft/min, is another speed unit that can be useful for technical and mechanical measurements.
It may be used for airflow, machinery, manufacturing, and other applications.
Meters per Minute
Meters per minute, written as m/min, describes how many meters are traveled in one minute.
It can be useful for conveyor systems, machinery, production equipment, and other measurements where movement is relatively slow.
Common Speed Conversions
Here are some useful speed conversions:
| From | Equivalent |
|---|---|
| 1 km/h | 0.621371 mph |
| 1 km/h | 0.277778 m/s |
| 1 mph | 1.609344 km/h |
| 1 mph | 0.44704 m/s |
| 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 ft/s | 0.3048 m/s |
| 1 m/min | 0.06 km/h |
Km/h to Mph
Converting kilometers per hour to miles per hour is one of the most common speed conversions.
The conversion is:
1 km/h ≈ 0.621371 mph
For example:
100 km/h ≈ 62.1371 mph
This can be useful when comparing vehicle speeds between countries that use different speed units.
Mph to Km/h
To convert miles per hour to kilometers per hour:
1 mph = 1.609344 km/h
For example:
60 mph = 96.56064 km/h
This conversion is particularly useful when reading speed limits, vehicle specifications, or travel information from another country.
Km/h to m/s
To convert kilometers per hour to meters per second:
1 km/h ≈ 0.277778 m/s
For example:
72 km/h = 20 m/s
This conversion is commonly used in physics and science problems.
M/s to Km/h
To convert meters per second to kilometers per hour:
1 m/s = 3.6 km/h
For example:
25 m/s = 90 km/h
This is a useful conversion when working with scientific measurements and everyday vehicle speeds.
Knots to Km/h
Knots are commonly used for ships and aircraft.
One knot is equal to:
1 kn = 1.852 km/h
For example:
20 knots = 37.04 km/h
Knots to Mph
One knot is approximately:
1 kn = 1.15078 mph
For example:
20 knots ≈ 23.0156 mph
This can be useful when comparing marine or aviation speeds with road speeds.
Speed in Driving
Speed conversion can be useful when traveling between countries that use different speed units.
For example, a speed limit may be shown in km/h in one country and mph in another.
The converter can quickly change the value between these units without requiring manual calculations.
Speed in Running and Cycling
Runners and cyclists may use different ways to describe their speed.
Cycling speeds are commonly given in km/h or mph, while running can involve both speed and pace.
The Speed Converter can help when you need to convert a known speed from one unit to another.
Speed in Aviation and Marine Travel
Knots are widely used in aviation and marine navigation.
If you have a speed in knots and need the equivalent value in km/h or mph, you can select Knot (kn) and the desired target unit.
For example:
30 knots = 55.56 km/h
Speed vs Velocity
Speed and velocity are related but are not exactly the same.
Speed describes how fast something moves, while velocity also includes the direction of movement.
For example, saying a car is traveling at 80 km/h describes its speed. Velocity would also specify the direction.
This converter is designed for speed measurements.
Why Use an Online Speed Converter?
Speed conversion is easy for simple values but can become inconvenient when you need precise results or are working with several different units.
An online converter lets you enter the value, select the units, and get the result immediately.
It can be useful for driving, travel, sports, science, engineering, aviation, marine navigation, schoolwork, and everyday calculations.
Frequently Asked Questions
What units does the Speed Converter support?
It supports kilometers per hour, miles per hour, meters per second, knots, feet per second, feet per minute, and meters per minute.
How many mph is 100 km/h?
100 km/h ≈ 62.1371 mph.
How many km/h is 60 mph?
60 mph = 96.56064 km/h.
How many km/h is 1 knot?
1 knot = 1.852 km/h.
How many mph is 1 knot?
1 knot ≈ 1.15078 mph.
How many km/h is 1 m/s?
1 m/s = 3.6 km/h.
Can I enter decimal speeds?
Yes. You can enter values such as 55.5, 2.75, or 100.25.
Can I convert knots to km/h?
Yes. Select Knot (kn) under From and Kilometer per Hour (km/h) under To.
Can I convert mph to km/h?
Yes. Select Mile per Hour (mph) under From and Kilometer per Hour (km/h) under To.
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