Instant Conversion
Get accurate results immediately
Multiple Units
Supports metric, imperial, and nautical units
Precise Results
High precision calculations
How to Convert Speed Units Online
Step-by-Step Instructions:
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1
Enter Speed Value: Type the speed you want to convert.
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2
Select Source Unit: Choose from MPH, KPH, m/s, knots, ft/s, or Mach.
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3
Select Target Unit: Choose your desired output unit.
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4
Get Results: Click "Convert" for instant accurate results.
Common Speed Conversions:
- 1 MPH = 1.60934 KPH
- 1 KPH = 0.621371 MPH
- 1 knot = 1.852 KPH
- 1 m/s = 3.6 KPH
- Mach 1 = 1,235 KPH (at sea level)
Supported Speed Units
🚗 Road Speed Units
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MPH (Miles per Hour): Standard in US and UK for road speeds
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KPH (Kilometers per Hour): Used worldwide for vehicle speeds
âš“ Maritime & Aviation
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Knots: Nautical miles per hour, used in maritime and aviation
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Mach: Speed relative to sound, used in aviation
🔬 Scientific Units
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m/s (Meters per Second): SI unit for velocity in physics
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ft/s (Feet per Second): Imperial unit for scientific calculations
When to Use Speed Conversion
Driving & Travel
Convert speed limits and vehicle speeds when traveling between countries using different measurement systems.
Maritime Navigation
Convert between knots and other speed units for sailing, boating, and maritime navigation.
Aviation
Convert aircraft speeds between knots, MPH, KPH, and Mach numbers for flight planning and performance.
Sports & Fitness
Track running pace, cycling speed, and athletic performance in your preferred measurement units.
Science & Physics
Convert velocity measurements for physics experiments, research, and scientific calculations.
Weather & Wind
Convert wind speeds from weather reports between different units for better understanding.
Frequently Asked Questions
How do I convert MPH to KPH?
Multiply the speed in miles per hour by 1.60934. For example, 60 MPH × 1.60934 = 96.56 KPH. Our converter performs this calculation instantly with high precision.
What is a knot in speed measurement?
A knot is a unit of speed equal to one nautical mile per hour, approximately 1.852 kilometers per hour or 1.151 miles per hour. It's the standard unit for maritime and aviation speeds.
How fast is Mach 1?
Mach 1 is the speed of sound, approximately 343 meters per second, 1,235 kilometers per hour, or 767 miles per hour at sea level under standard atmospheric conditions. The actual speed varies with temperature and altitude.
Why do different countries use different speed units?
Most countries use the metric system (KPH), while the United States and a few others use the imperial system (MPH). Maritime and aviation industries worldwide use knots for consistency and safety.
Is this speed converter accurate?
Yes, our converter uses precise conversion factors based on international standards and displays results with up to 6 decimal places for maximum accuracy in all calculations.
Is the speed converter free?
Yes, completely free with no registration, downloads, or hidden fees. Convert unlimited speed measurements anytime on any device.
Quick Reference Conversion Table
| From | To | Multiply By | Example |
|---|---|---|---|
| MPH | KPH | 1.60934 | 60 mph = 96.56 kph |
| KPH | MPH | 0.621371 | 100 kph = 62.14 mph |
| Knots | KPH | 1.852 | 50 kn = 92.6 kph |
| m/s | KPH | 3.6 | 10 m/s = 36 kph |
| MPH | m/s | 0.44704 | 60 mph = 26.82 m/s |
| Knots | MPH | 1.15078 | 100 kn = 115.08 mph |