Calculate velocity (speed), distance, or time using v = d/t. Supports metres/second, km/h, mph, and more. Shows kinetic energy at any mass. Essential physics tool.
Velocity = Distance / Time (v = d/t). Speed is the magnitude of velocity. To find distance: d = v × t. To find time: t = d / v. This calculator solves all three forms.
Speed is a scalar (magnitude only). Velocity is a vector (magnitude and direction). A car travelling 60 km/h north has the same speed as one going 60 km/h south, but different velocities.
The speed of sound in air at sea level is approximately 343 m/s (1,235 km/h or 767 mph). This varies with temperature — sound travels faster in warmer air. Mach 1 = the speed of sound.
Mach number is velocity relative to the speed of sound. Mach 1 = 343 m/s. Mach 2 = 686 m/s. Commercial aircraft fly at Mach 0.85. Concorde flew at Mach 2. Some military aircraft exceed Mach 3.
The International Space Station orbits at approximately 7,800 m/s (28,080 km/h or 17,500 mph). At this speed, it completes one orbit every 90 minutes.
Divide by 3.6. For example: 100 km/h ÷ 3.6 = 27.78 m/s. To convert m/s to km/h, multiply by 3.6.
Average velocity = total displacement / total time. Instantaneous velocity is the velocity at a specific moment. A car speedometer shows instantaneous speed. This calculator computes average velocity.