Velocity Unit Conversion

FAQ

• What's the difference between velocity and speed?
  While often used interchangeably, velocity is technically a vector quantity (has direction), while speed is a scalar quantity (magnitude only). In unit conversion, we typically work with speed values. Both use the same units of distance per time.
• How do I convert between metric and imperial speed units?
  Use conversion factors: 1 m/s = 3.28084 ft/s, 1 km/h = 0.621371 mph, 1 m/s = 2.237 mph. For quick estimates: multiply km/h by 0.6 to get mph, or multiply m/s by 2.2 to get mph.
• Why are there so many different speed units?
  Different applications require different scales: m/s for physics and engineering, km/h for automotive speeds, ft/s for fluid mechanics, mph for everyday travel, and specialized units like knots for maritime and aviation applications.
• What are typical speed values in different units?
  Walking speed: ~1.4 m/s (5 km/h, 3 mph), highway driving: ~30 m/s (108 km/h, 67 mph), commercial aircraft: ~250 m/s (900 km/h, 560 mph). These help provide context for conversions.
• How accurate are the conversion calculations?
  Our conversions use precise conversion factors and display results to appropriate significant figures. For most engineering and practical applications, the accuracy is more than sufficient. Critical applications may require consideration of measurement uncertainty.
• When should I use different speed units?
  Use m/s for scientific calculations and fluid mechanics, km/h for automotive and general transportation, ft/s for HVAC and fluid flow in imperial systems, mph for everyday travel speeds, and specialized units like ft/min for conveyor systems or ventilation.