🚀 Speed Converter
Convert between different speed units including kilometers per hour, miles per hour, meters per second, knots, and more. Perfect for automotive, aviation, sports, and velocity calculations.
🚀 Speed Units Reference
Meter per Second
m/s
Kilometer per Hour
km/h
Mile per Hour
mph
Foot per Second
ft/s
Knot
kn
Table of Contents
What is a Speed Converter?
A speed converter is a tool that converts measurements of speed (velocity) from one unit to another. Whether you need to convert kilometers per hour to miles per hour, meters per second to knots, or any other speed unit combination, a speed converter makes these calculations instant and accurate.
Speed conversions are essential in many fields including automotive, aviation, maritime, sports, weather, and everyday life. Different countries and industries use different measurement systems (metric vs imperial), making conversions a common necessity.
Our speed converter supports 5 different units including metric units (meters per second, kilometers per hour) and imperial units (miles per hour, feet per second, knots), handling everything from walking speeds to supersonic velocities.
How it Works
Our speed converter uses precise conversion factors to accurately transform values between different speed units:
- Select Units: Choose the source unit and target unit from the dropdowns
- Enter Value: Input the speed measurement you want to convert
- Instant Results: The conversion is calculated automatically in real-time
- Swap Units: Click the swap button to reverse the conversion direction
The converter works by first converting to a base unit (meters per second), then converting to the target unit. All conversions use standard, internationally recognized conversion factors for maximum accuracy.
Supported Units
Metric Units
- Meter per Second (m/s) - Base unit
- Kilometer per Hour (km/h) - 0.277778 m/s
Imperial & Other Units
- Mile per Hour (mph) - 0.44704 m/s
- Foot per Second (ft/s) - 0.3048 m/s
- Knot (kn) - 0.514444 m/s
Common Use Cases
- Automotive: Convert speed limits, vehicle speeds, and fuel efficiency ratings between km/h and mph
- Aviation: Convert aircraft speeds between knots, mph, and km/h for flight planning and navigation
- Maritime: Convert ship speeds between knots and other units for navigation and maritime operations
- Sports: Convert running speeds, cycling speeds, and athletic performance measurements
- Weather: Convert wind speeds between different units for weather reports and forecasts
- Physics & Engineering: Convert velocities and speeds for scientific calculations and engineering applications
- Travel: Convert speed limits and travel speeds when driving in different countries
Conversion Examples
Kilometers per Hour to Miles per Hour
1 km/h = 0.621371 mph
Example: A 100 km/h speed limit is approximately 62.14 mph. A 60 km/h road is approximately 37.28 mph.
Meters per Second to Kilometers per Hour
1 m/s = 3.6 km/h
Example: A 10 m/s wind speed is 36 km/h. A 5 m/s running pace is 18 km/h.
Knots to Miles per Hour
1 knot = 1.15078 mph
Example: A 30-knot wind is approximately 34.52 mph. A 20-knot boat speed is approximately 23.02 mph.
Miles per Hour to Feet per Second
1 mph = 1.46667 ft/s
Example: A 60 mph speed is approximately 88 ft/s. A 30 mph speed is approximately 44 ft/s.
Frequently Asked Questions
A knot is a unit of speed equal to one nautical mile per hour (approximately 1.15 mph or 1.85 km/h). It's used in maritime and aviation because nautical miles correspond to minutes of latitude, making navigation calculations easier. The term "knot" comes from the old practice of measuring ship speed using a knotted rope.
To convert km/h to m/s, divide by 3.6. For example, 100 km/h ÷ 3.6 = 27.78 m/s. To convert m/s to km/h, multiply by 3.6. For example, 10 m/s × 3.6 = 36 km/h.
No. All conversions happen entirely in your browser. We don't store, log, or transmit any values you enter. Your calculations are completely private.