Speed & Velocity Converter

Speed measures how much distance an object covers over a specific duration of time (Speed = Distance / Time). Whether you are analyzing a car's speedometer, tracking a hurricane, or studying physics, our converter instantly translates velocity across land, sea, and scientific units.

Common Speed Measurements

• Miles Per Hour (mph): The standard road speed limit unit in the US, UK, and a few Caribbean nations.
• Kilometers Per Hour (km/h): The global standard for automotive speed limits. (100 km/h ≈ 62 mph).
• Meters Per Second (m/s): The standard SI unit used in physics and engineering.
• Knots (kn): Used exclusively in aviation and maritime navigation. One knot equals one nautical mile per hour (approx. 1.15 mph). A nautical mile is based on the circumference of the Earth.

Fun Fact: Terminal Velocity

Terminal velocity is the maximum speed a falling object can reach before air resistance perfectly balances the force of gravity. For a human skydiver in a belly-to-earth freefall, terminal velocity is roughly 120 mph (193 km/h or 54 m/s).