Speed Calculator

Convert between different speed units easily

Speed Calculator

Enter the speed to convert

Understanding Speed Units

Different speed units are used in various contexts. Here's when each is commonly used:

  • MPH (Miles per Hour): Common in the US and UK for road speeds
  • KPH (Kilometers per Hour): Used in most countries for road speeds
  • FPS (Feet per Second): Used in physics and engineering calculations
  • MPS (Meters per Second): The SI unit for speed, used in scientific contexts
  • Knots: Used in maritime navigation and aviation
How to Use the Calculator

Follow these steps to convert between speed units:

  • Enter the speed value you want to convert
  • Select the unit you're converting from (MPH, KPH, FPS, MPS, or knots)
  • Click "Convert" to see the equivalent speeds in all units
  • Results show conversions to all common speed units
Speed Conversion Reference

Quick reference for common speed conversions:

  • 1 MPH = 1.60934 KPH
  • 1 MPH = 1.46667 FPS
  • 1 MPH = 0.44704 MPS
  • 1 MPH = 0.868976 Knots
  • 1 KPH = 0.621371 MPH
  • 1 Knot = 1.15078 MPH

These conversions are useful for:

  • International travel planning
  • Vehicle speed compliance
  • Scientific calculations
  • Maritime and aviation navigation
Frequently Asked Questions

Why are there different units for speed?

Different speed units evolved from various historical and practical needs. MPH and KPH are used for road travel, knots for navigation, and MPS for scientific work.

What's the difference between speed and velocity?

Speed is a scalar quantity that measures how fast something is moving, while velocity is a vector quantity that includes both speed and direction.

Why do ships and aircraft use knots?

Knots are used because they're directly related to nautical miles, which are based on the Earth's circumference. This makes navigation calculations simpler.