Speed Converter
Convert between mph, kph, meters per second, knots, and more. Fast, accurate, mobile-friendly speed conversions for travel and navigation.
Universal Speed Converter
Common in US/UK
Used worldwide
Quick Conversion Formulas
Common Speed Reference Points
Walking Speed
3 mph / 5 kph
Running Speed
6-8 mph / 10-13 kph
City Speed Limit
25-35 mph / 40-55 kph
Highway Speed
65-70 mph / 105-115 kph
Understanding Speed & Velocity
Speed Limits
US uses mph (miles per hour), most countries use km/h (kilometers per hour).
Running Pace
A 10 km/h pace = 6.2 mph - Common for casual joggers.
Highway Speed
65 mph = 104.6 km/h - Typical US interstate speed limit.
Quick Conversion
Multiply mph by 1.6 to get approximate km/h (60 mph ≈ 96 km/h).
Popular Speed Conversions
Quick Speed Conversion Reference
| From | To | Formula | Example |
|---|---|---|---|
| MPH | KPH | kph = mph × 1.609 | 60 mph = 96.56 kph |
| KPH | MPH | mph = kph × 0.621 | 100 kph = 62.14 mph |
| M/S | KPH | kph = m/s × 3.6 | 25 m/s = 90 kph |
| KPH | M/S | m/s = kph ÷ 3.6 | 72 kph = 20 m/s |
| Knots | KPH | kph = knots × 1.852 | 50 kn = 92.6 kph |
| Knots | MPH | mph = knots × 1.151 | 50 kn = 57.54 mph |
| M/S | MPH | mph = m/s × 2.237 | 30 m/s = 67.11 mph |
Understanding Speed Units
Miles Per Hour (mph)
The imperial unit of speed used primarily in the United States and United Kingdom. Essential for American road travel and vehicle specifications.
Common uses:
- US/UK speed limits
- Vehicle speedometers
- Weather reports (wind speed)
- Aviation in some contexts
Kilometers Per Hour (kph)
The metric unit of speed used worldwide. Part of the International System of Units (SI) and the standard for most countries globally.
Common uses:
- International speed limits
- GPS and navigation
- Scientific measurements
- European road signs
Meters Per Second (m/s)
The SI base unit for velocity, used primarily in scientific and engineering contexts. Provides precise measurements for physics calculations.
Common uses:
- Scientific research
- Physics calculations
- Engineering specs
- Wind speed measurements
Knots (kn)
A unit of speed equal to one nautical mile per hour, used primarily in maritime and aviation contexts. Essential for navigation at sea and in the air.
Common uses:
- Maritime navigation
- Aviation speed
- Weather forecasting
- Ocean currents
When to Convert Speed Units
Travel & Navigation:
- International road trips
- Renting cars abroad
- Understanding foreign speed limits
- GPS device settings
Professional Use:
- Maritime navigation
- Aviation calculations
- Scientific research
- Vehicle specifications
Conversion History
No conversion history yet
Your recent conversions will appear here
Need More Tools?
For calculations and conversions beyond conversions, try PresentForge - Build stunning presentations with AI assistance.
⚠️ Important Disclaimer
This tool provides estimates for informational purposes only. Results should not be relied upon for important decisions. Always consult with a qualified professional for advice specific to your situation.