Speed Converter

Category: General Math Tools
- April 12, 2025
| |

Convert between different speed and velocity units

Meters per second (m/s)
0
Kilometers per hour (km/h)
0
Miles per hour (mph)
0
Feet per second (ft/s)
0
Knots
0
Mach (at sea level)
0

Context of Your Speed

Enter a value to see comparative examples

About Speed Units

Speed is the measure of how quickly an object moves from one position to another. Different units are used in different contexts and regions.

Common Speed Units:

  • Meters per second (m/s): The SI unit of speed. Used in scientific and technical contexts.
  • Kilometers per hour (km/h): Common for vehicle speeds in most countries using the metric system.
  • Miles per hour (mph): Standard speed unit in the United States and United Kingdom.
  • Feet per second (ft/s): Often used in engineering applications in the US.
  • Knots: Used in marine and air navigation. One knot equals one nautical mile per hour (approximately 1.852 km/h).
  • Mach: Ratio of an object's speed to the speed of sound. Mach 1 is approximately 343 m/s (1,235 km/h) at sea level and 20°C.

Conversion Formulas

Meters per second (m/s) conversions:

1 m/s = 3.6 km/h

1 m/s = 2.23694 mph

1 m/s = 3.28084 ft/s

1 m/s = 1.94384 knots

1 m/s = 0.00291545 Mach (at sea level)

Kilometers per hour (km/h) conversions:

1 km/h = 0.277778 m/s

1 km/h = 0.621371 mph

1 km/h = 0.911344 ft/s

1 km/h = 0.539957 knots

1 km/h = 0.000809848 Mach (at sea level)

Miles per hour (mph) conversions:

1 mph = 0.44704 m/s

1 mph = 1.60934 km/h

1 mph = 1.46667 ft/s

1 mph = 0.868976 knots

1 mph = 0.00130332 Mach (at sea level)

Practical Speed Examples

  • Walking pace: 5 km/h (3.1 mph)
  • Running pace: 12 km/h (7.5 mph)
  • Cycling, moderate pace: 20 km/h (12.4 mph)
  • Urban speed limit: 50 km/h (31 mph)
  • Highway speed limit: 100 km/h (62 mph)
  • High-speed train: 300 km/h (186 mph)
  • Commercial aircraft cruising: 900 km/h (560 mph)
  • Speed of sound: 1,235 km/h (767 mph) at sea level
  • Earth's orbit around the Sun: 107,000 km/h (66,600 mph)

Note:

Speed of sound (Mach 1) varies with altitude and temperature. The standard value at sea level and 20°C is approximately 343 m/s (1,235 km/h or 767 mph).

Zoom Through Speed Math with Ease!

What This Calculator Does

The Speed Converter helps you switch between different speed units—like kilometers per hour, miles per hour, meters per second, and even Mach (the speed of sound). It’s handy when you're working on school homework, planning a road trip, or just curious how fast something is moving. If you’ve ever wondered how fast a train in Japan compares to your car on the highway, this calculator can show you in seconds.

It doesn’t just give you numbers—it helps you see how one speed compares to another. You’ll understand if something is faster than a cheetah or slower than walking pace. That’s way more fun than guessing!

Fast Facts: Key Features and Functions

Here's what you can do with the Speed Converter:

  • ✅ Convert speed from one unit to another instantly
  • ✅ Choose from units like km/h, mph, m/s, ft/s, knots, and Mach
  • ✅ See multiple conversions at once—no need to switch back and forth
  • ✅ Get helpful real-world comparisons (like how your speed stacks up to a train or plane)
  • ✅ Reset the calculator anytime to start fresh

Everyday Benefits

You don’t have to be a rocket scientist to use this. Whether you’re a student, traveler, or just someone who likes fun facts, this tool comes in clutch.

  • 📘 Homework help: Need to convert 90 km/h to mph for a physics problem? Done.
  • 🚗 Travel planning: Want to know how fast your rental car in Europe compares to U.S. speed limits? This helps.
  • ✈️ Fun facts: Curious how fast an airplane goes compared to your morning jog? Find out in a click.

Example: If your friend says they were driving at 100 km/h, but you think in miles per hour, just plug it in. You’ll see it’s about 62 mph.

Step on the Gas: How to Use It

Using the Speed Converter is as easy as tying your shoes:

  1. Type in the number in the "Enter Speed" box.
  2. Choose the unit you’re starting with from the dropdown menu (like km/h or mph).
  3. Click the "Convert" button.
  4. Boom! All the other speeds show up below.
  5. Want to try again? Click "Reset" and start over.

And yes—you can press “Enter” on your keyboard instead of the button, too!

Crunching the Final Numbers

You don’t need to pull out your calculator or do math in your head anymore. The Speed Converter does the thinking for you. Whether you're learning about physics, geeking out over jet speeds, or comparing a cheetah to a sports car, this calculator makes speed simple.

Next time you're stuck on a problem or just curious how fast something is moving, give this a spin. It's like having a smart friend who loves math—but with no pressure to do the homework for you.

Speed up your day—one click at a time. 🏁