Speed Converter
Convert between different speed units instantly. Supports km/h, mph, m/s, ft/s, knots, and many more velocity units.
Result
0.621371 mph
1 km/h = 0.621371 mph
Quick Conversions
Conversion Table
| Input | From | To | Result |
|---|---|---|---|
| 1 | km/h | mph | 0.621371 |
| 1 | km/h | m/s | 0.277778 |
| 1 | km/h | ft/s | 0.911344 |
| 1 | km/h | kn | 0.539957 |
| 1 | km/h | km/s | 0.000278 |
| 1 | km/h | mi/s | 0.000173 |
Speed Converter - Complete Guide
Convert between all speed units including km/h, mph, m/s, ft/s, knots, and many more. Perfect for driving, running, aviation, and scientific calculations.
Conversion Formula: Value × (From Unit Factor / To Unit Factor)
Use this formula to convert any speed unit to another. Select your units above and get instant results!
Common Speed Conversions
Frequently Asked Questions
What speed units are supported?
Our speed converter supports 35+ units including cm/h, cm/s, m/s, km/h, mph, ft/s, knots, and many more. All major speed and velocity units are covered.
What is the difference between speed and velocity?
Speed is a scalar quantity measuring how fast something is moving. Velocity is a vector quantity that includes both speed and direction. Our converter handles both.
How do I convert km/h to mph?
To convert km/h to mph, multiply by 0.621371. For example, 100 km/h × 0.621371 = 62.137 mph.
What is a knot?
A knot (kn) is a unit of speed equal to one nautical mile per hour (1.852 km/h or 1.15078 mph). It is commonly used in maritime and aviation contexts.
What is the speed of sound?
The speed of sound is approximately 343 m/s (1,235 km/h or 767 mph) at sea level and 20°C. This varies with temperature and altitude.
How accurate are these speed conversions?
Our speed converter uses precise conversion factors based on the SI unit meters per second (m/s). All conversions are accurate to 6 decimal places.
Quick Conversion Tips
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