What is Knots?

Knot measures speed. This unit is used in meteorology, aviation and maritime. Its uses the symbol kt or kn and is equal to number of nautical mile per hour.

Knots can be calculated using following formula. Please note that $t$ is in hours

$$kn = \frac{x}{t}$$

or

$$1 kn = 1 \frac{nmi}{h} = 1.852 \frac{km}{h}$$

$kn$ - Knots $nmi$ - Nautical mile
$km$ - Kilometres
$x$ - Number of knots
$t$ - Time in hours

Wiki page for Knots Wiki page for Nautical Mile

What is Kilometres per hour?

Kilometres (or Kilometers) per hour measures speed. This unit of speed measures how many Kilometres traveled in one hour. Its is part of the SI units system. Commonly, express as km/h, or kph.

Kilometres per hour can be calculated using following formula. Please note that $t$ is in hours

$$kph = \frac{x}{t}$$

$kph$ - Kilometres per hour
$x$ - Number of kilometres
$h$ - Hour
$t$ - Time in hours

Wiki page for Kilometres
Wiki page for Kilometres per hour