Question 1

How to convert km/h and mph?

Accepted Answer

1 km/h ≈ 0.621371 mph, 1 mph ≈ 1.60934 km/h. mph is common in the UK and US, while km/h is used in most of the world.

Question 2

How many km/h is 1 knot?

Accepted Answer

1 knot = 1.852 km/h, primarily used in aviation and maritime for speed.

Question 3

What is the speed of light in m/s?

Accepted Answer

The speed of light is approximately 299,792,458 m/s (about 300,000 km/s), the ultimate speed limit for information in the universe.