KPH ↔ MPH Converter
Convert between kilometers per hour and miles per hour instantly
Enter km/h value to convert to MPH
Enter mph value to convert to KPH
🚗 City Speed: 50 km/h = 31 mph
🛣️ Highway: 110 km/h = 68 mph
🏎️ Fast Car: 200 km/h = 124 mph
Conversion Result
100 km/h = 62.14 mph
27.78 m/s • 91.13 ft/s • 54.0 knots
📚 KPH ↔ MPH Conversion Details
KPH to MPH Formula
mph = kph ÷ 1.609344
To convert kilometers per hour to miles per hour, divide by 1.609344 (the exact conversion factor).
MPH to KPH Formula
kph = mph × 1.609344
To convert miles per hour to kilometers per hour, multiply by 1.609344.
Bidirectional Conversion
This converter works both ways simultaneously:
- Type in KPH → MPH updates automatically
- Type in MPH → KPH updates automatically
- No buttons to click - works as you type
Common Uses
- Vehicle speedometers
- Speed limit conversions
- Sports car specifications
- Weather reports (wind speed)
📏 How This Converter Works
This is a bidirectional converter that works in real-time:
- KPH → MPH: When you type in the km/h field, the mph field automatically updates
- MPH → KPH: When you type in the mph field, the km/h field automatically updates
- No swapping needed: Both conversions happen simultaneously
- Real-time: Updates happen as you type, no button clicks required
// Bidirectional Conversion Logic:
mph = kph ÷ 1.609344
kph = mph × 1.609344
// Example 1: Type "100" in KPH
mph = 100 ÷ 1.609344 = 62.1371
// Example 2: Type "70" in MPH
kph = 70 × 1.609344 = 112.6541
mph = kph ÷ 1.609344
kph = mph × 1.609344
// Example 1: Type "100" in KPH
mph = 100 ÷ 1.609344 = 62.1371
// Example 2: Type "70" in MPH
kph = 70 × 1.609344 = 112.6541
📊 Common Speed Conversions
| KPH (km/h) | MPH (mph) | Typical Usage |
|---|---|---|
| 30 km/h | 18.6 mph | School zone speed |
| 50 km/h | 31.1 mph | City driving |
| 80 km/h | 49.7 mph | Rural roads |
| 100 km/h | 62.1 mph | Highway speed |
| 120 km/h | 74.6 mph | Freeway speed |
| 200 km/h | 124.3 mph | Sports car |
❓ Frequently Asked Questions
Q: What's the exact conversion factor between KPH and MPH?
A: 1 kilometer per hour equals approximately 0.621371 miles per hour. The exact factor is 1 ÷ 1.609344.
Q: How many KPH is 60 MPH?
A: 60 miles per hour equals approximately 96.56 kilometers per hour.
Q: Why do different countries use different speed units?
A: Most countries use metric system (KPH), while the US, UK, and some others use imperial system (MPH).
Q: Do I need to click any button to convert?
A: No! The conversion happens automatically as you type in either field.