Speed converter

Frequently asked questions

How fast is 1 knot in miles per hour?

One knot equals approximately 1.151 mph. Knots are the standard unit for maritime and aviation speeds because they are defined relative to one nautical mile per hour, which relates directly to latitude-based navigation.

What is the difference between mph and ft/s for everyday use?

Miles per hour is the common road-speed unit in the United States, while feet per second shows up more often in physics problems and engineering contexts. A car traveling at 60 mph is moving at exactly 88 ft/s.

Why does the calculator use meters per second as the internal base unit?

Meters per second is the SI base unit for speed, so using it as the intermediate step keeps all conversion factors exact and traceable to international standards rather than chained approximations.

Can I convert negative speeds?

No. The calculator treats speed as a non-negative quantity and rejects negative inputs. If you need to work with velocity (which includes direction), the sign would need to be handled separately from the magnitude.