2 km/h to kn — 2 kilometres per hour in knots
Exact 2 ÷ 1.852 = 1.079914
2 kilometres per hour in other units
| Metres per second | 0.55555556 | m/s |
|---|---|---|
| Miles per hour | 1.242742 | mph |
| Feet per second | 1.822689 | ft/s |
| Knots | 1.079914 | kn |
km/h to kn at a glance
| Kilometres per hour | Knots |
|---|---|
| 1 km/h | 0.5399568 kn |
| 2 km/h | 1.079914 kn |
| 3 km/h | 1.61987 kn |
| 5 km/h | 2.699784 kn |
| 10 km/h | 5.399568 kn |
| 20 km/h | 10.799136 kn |
| 25 km/h | 13.49892 kn |
| 50 km/h | 26.99784 kn |
| 100 km/h | 53.99568 kn |
| 250 km/h | 134.989201 kn |
| 500 km/h | 269.978402 kn |
| 1,000 km/h | 539.956803 kn |
How to convert kilometres per hour to knots
Multiply by 0.5399568 — one kilometre per hour is 0.5399568 knots. That factor is exact: it comes from the definition of the units rather than from a measurement, so it will not change and does not need rounding.
Working 2 ÷ 1.852 = 1.079914
In words: about one knots.
Questions
How many knots are in a kilometre per hour?
One kilometre per hour is 0.5399568 knots. This figure is exact — it comes from the definition of the unit, not a measurement.
What is 2 kilometres per hour in knots?
2 kilometres per hour is 1.079914 knots. The working is 2 ÷ 1.852 = 1.079914.
What is a knot?
One nautical mile per hour — and a nautical mile is one minute of latitude, fixed at exactly 1,852 metres. That is the whole point of it: a ship making 10 knots for six hours has covered one degree of latitude, which you can read straight off a chart without converting anything.
Why do sailors and pilots say "knots" and not "knots per hour"?
Because the "per hour" is already inside the word. A knot is a speed, not a distance, so "knots per hour" would be an acceleration. The name comes from the knotted rope once paid out behind a ship and counted against a sand glass.
What's the quick way to convert mph to km/h in my head?
Multiply by 1.6, or add 60%. For the other direction, take away a third and then a little more. Fifty mph is 80 km/h, 60 is 97, 70 is 113 — worth remembering if you drive across a border where the signs change.
Why isn't Mach on this page?
Because it is not a fixed unit. Mach 1 is the local speed of sound, which falls as air gets colder — around 1,235 km/h at sea level but closer to 1,062 km/h in the stratosphere where airliners cruise. A single conversion factor would be wrong nearly everywhere.