Why Use This Tool?
Speed units change with context: mph for US driving, km/h almost everywhere else, knots at sea and in the air, m/s in physics. This converter shows your speed in all five units at once — enter once, read them all.
The conversion factors are exact: 1 mph = 0.44704 m/s, 1 knot = 1 nautical mile per hour — which is why 60 mph, 96.56 km/h, and 52.14 knots all describe the same motion.
How It Works
- Enter the speed value.
- Pick the source and target units.
- Read all five conversions with your target highlighted.
Frequently Asked Questions
How do I convert mph to km/h?
Multiply mph by 1.609344 — 60 mph is 96.56 km/h. The converter uses the exact factor that miles and kilometers are defined by.
What is a knot in mph?
One knot is one nautical mile per hour = 1.852 km/h ≈ 1.15078 mph. Aviation and marine speeds stay in knots because a nautical mile maps to latitude.
Why is m/s the physics unit?
It keeps equations clean: force, energy, and acceleration formulas all assume meters and seconds. 10 m/s is 36 km/h.
Tips & Things to Watch
- Running pace is minutes per km — invert your km/h to compare with pace charts.
- Speed limit signs: 100 km/h ≈ 62 mph is the conversion every renter needs.
- Knots and nautical miles pair together — the same latitude-based system.