Speed Converter
Convert between m/s, km/h, mph, ft/s, knots and other speed units instantly
Speed Conversion Calculator
Enter the speed you want to convert
Select the target unit for conversion
Conversion Result
Quick Reference
Example Conversions
Speed of Sound (Typical)
Speed in air: 343 m/s
Conversion: 343 × 3.6 = 1,234.8 km/h
Result: Sound travels at about 1,235 km/h
Highway Speed Limit
Common limit: 100 km/h
Conversion: 100 ÷ 3.6 = 27.78 m/s
Result: Highway speed is about 27.8 m/s
Running Speed
Marathon pace: 5.5 m/s
Conversion: 5.5 × 3.6 = 19.8 km/h
Result: Good marathon pace is about 20 km/h
Conversion Formulas
m/s to km/h
km/h = m/s × 3.6
km/h to m/s
m/s = km/h × 0.2778
m/s to mph
mph = m/s × 2.237
m/s to knots
kn = m/s × 1.944
Speed Comparisons
Understanding Speed Conversion
What is Speed?
Speed is a measure of how fast an object moves, defined as the distance traveled per unit of time. It's expressed as distance units divided by time units, like meters per second (m/s) or kilometers per hour (km/h).
Common Speed Units
- •m/s: Meters per second (SI base unit)
- •km/h: Kilometers per hour (common for vehicles)
- •mph: Miles per hour (imperial system)
- •knots: Nautical miles per hour (marine/aviation)
Conversion Methods
Method 1: Direct multiplication
m/s × 3.6 = km/h
km/h × 0.2778 = m/s
Method 2: Unit analysis
1 m/s = 1 m/s × (3600 s/h) × (1 km/1000 m)
= 3600/1000 km/h = 3.6 km/h
Memory tip: To convert m/s to km/h, multiply by 3.6 (or divide by 0.2778 to go the other way)