Speed Converter
Convert between different speed units including km/h, mph, m/s, knots, and more with our free online speed converter. Fast, accurate, and mobile-friendly tool for all your speed conversion needs.
How to Use the Speed Converter
- Enter the speed value you want to convert in the "From Speed Value" field.
- Select the unit you're converting from in the "From Unit" dropdown.
- Select the unit you want to convert to in the "To Unit" dropdown.
- Click the "Convert Speed" button to see the result.
- The converted value will appear instantly in the "Converted Value" field.
- Use the Reset button to clear all fields and start a new conversion.
Speed Conversion Formulas
Common Speed Conversions:
- km/h to mph: mph = km/h × 0.621371
- mph to km/h: km/h = mph × 1.60934
- m/s to km/h: km/h = m/s × 3.6
- km/h to m/s: m/s = km/h ÷ 3.6
- knots to km/h: km/h = knots × 1.852
- mph to m/s: m/s = mph × 0.44704
Use Cases and Applications
Transportation and Travel:
- Converting speed limits between countries (mph to km/h)
- Aviation speed calculations (knots to km/h or mph)
- Marine navigation (knots to other units)
- International driving and travel planning
Sports and Fitness:
- Running pace calculations (m/s to km/h)
- Cycling speed tracking
- Swimming speed analysis
- Racing and athletic performance measurement
Science and Engineering:
- Physics calculations and experiments
- Wind speed measurements
- Mechanical engineering applications
- Fluid dynamics and aerodynamics studies
Speed Conversion Examples
Example 1: Highway Speed
Converting 100 km/h to mph:
100 km/h = 100 × 0.621371 = 62.14 mph
Example 2: Running Speed
Converting 5 m/s to km/h:
5 m/s = 5 × 3.6 = 18 km/h
Example 3: Aviation Speed
Converting 250 knots to km/h:
250 knots = 250 × 1.852 = 463 km/h
Example 4: City Speed Limit
Converting 30 mph to km/h:
30 mph = 30 × 1.60934 = 48.28 km/h
About This Speed Converter
Our free online speed converter is designed to help you quickly and accurately convert between various speed units. Whether you're a student working on physics problems, a traveler trying to understand speed limits in different countries, or a professional in aviation or marine industries, this tool provides instant and precise conversions.
The converter supports all major speed units including kilometers per hour (km/h), miles per hour (mph), meters per second (m/s), knots, feet per second (ft/s), and even specialized units like Mach and speed of light fractions for advanced calculations.
All conversions are performed using internationally recognized conversion factors to ensure accuracy and reliability in your calculations.
Frequently Asked Questions
How do I convert km/h to mph?
To convert kilometers per hour to miles per hour, multiply the speed in km/h by 0.621371. For example, 100 km/h = 100 × 0.621371 = 62.14 mph.
What is the formula for converting mph to km/h?
To convert miles per hour to kilometers per hour, multiply the speed in mph by 1.60934. For example, 60 mph = 60 × 1.60934 = 96.56 km/h.
How do I convert m/s to km/h?
To convert meters per second to kilometers per hour, multiply the speed in m/s by 3.6. For example, 10 m/s = 10 × 3.6 = 36 km/h.
What is a knot in speed measurement?
A knot is a unit of speed equal to one nautical mile per hour. It's commonly used in aviation and marine navigation. 1 knot = 1.852 km/h = 1.151 mph.
Is this speed converter accurate?
Yes, our speed converter uses internationally recognized conversion factors and provides results accurate to multiple decimal places, making it suitable for both casual and professional use.