Speed Converter

Everything converts through miles per hour: value x (mph per the unit you have) / (mph per the unit you want). One mile is 1.609344 km exactly, so 1 km/h is 0.621371 mph. A knot is one nautical mile per hour, and a nautical mile is 1,852 meters.

What is 100 km/h in mph?

About 62 mph. The quick estimate is to take away a third and add a little: for 100, a third off gives 67, and the true answer is 62. For most highway speeds, multiplying by 0.6 is close.

What is a knot?

One nautical mile per hour, which is about 1.15 mph or 1.85 km/h. A nautical mile is one minute of latitude, which is why ships and aircraft use it: it maps directly onto a chart.

How do I convert mph to meters per second?

Divide by 2.237. A useful anchor is that 1 m/s is a brisk walk, about 2.24 mph, and 10 m/s is roughly 22 mph, which is close to a good sprinter over 100 meters.