Convert Speeds Easily

Convert between meters/second, kilometers/hour, miles/hour, knots, feet/second and Mach instantly.

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Speed Converter – m/s, km/h, mph & more
Use our free Speed Conversion Calculator to easily switch between meters/second (m/s), kilometers/hour (km/h), miles/hour (mph), knots, feet/second and Mach.

Speed conversion refers to translating a velocity value from one measurement unit to another. It’s essential in science, travel, aviation and daily life.

  • 1 m/s = 3.6 km/h
  • 1 mph ≈ 1.609 km/h
  • 1 knot = 1.852 km/h
  • 1 ft/s ≈ 0.3048 m/s
  • Mach 1 ≈ 343 m/s (at sea level)
Speed Converter – MPH, KPH, Knots & More
Use our free Speed Conversion Calculator to quickly convert between miles per hour (mph), kilometers per hour (kph), meters per second (m/s), feet per minute (ft/min), knots and even the speed of light. Whether for cars, bikes, wind speed, or scientific purposes, this tool provides instant and accurate speed conversions.

Speed is the measure of how fast an object moves, calculated as distance divided by time. Since different regions and industries use different units, speed conversion is essential in transportation, aviation, meteorology and science.

  • 1 Mile per hour (mph) = 1.609 Kilometers per hour (kph)
  • 1 Knot = 1.852 Kilometers per hour
  • 1 m/s = 3.6 Kilometers per hour
  • 1 ft/min = 0.00508 m/s

Instead of doing manual math, our speed converter gives you precise conversions instantly.

Our online speed calculator is simple and intuitive:

  • Step 1: Enter the speed value you want to convert.
  • Step 2: Select the unit you want to convert from (e.g., mph, kph, m/s).
  • Step 3: Choose the unit you want to convert to.
  • Step 4: Click “Convert” to see the accurate result instantly.

This is perfect for converting driving speed, cycling speed, wind speed, or scientific values.

Here are the most widely used units for measuring speed:

  • Miles per hour (mph): Common in the US for vehicles and road speed.
  • Kilometers per hour (kph): Standard SI unit used worldwide for road speed.
  • Meters per second (m/s): Widely used in physics and engineering.
  • Feet per minute (ft/min): Used in mechanical and industrial applications.
  • Knot (kn): Used in aviation and maritime navigation (1 kn = 1 nautical mile per hour).
  • Speed of light (c): Universal physical constant used in science.

Quick conversions:

  • 1 mph = 1.609 kph
  • 1 knot = 1.852 kph
  • 1 m/s = 3.6 kph

Speed conversion is essential for many real-world and professional applications, including:

  • Driving & travel – converting mph to kph for international road trips.
  • Cycling & running – tracking performance in different speed units.
  • Aviation & marine – converting knots to mph or kph.
  • Meteorology – converting wind speeds between knots, mph and m/s.
  • Science & engineering – using standard SI speed units (m/s).

With instant results, our calculator saves you time and ensures accuracy.

  • Converts between mph, kph, m/s, ft/min, knots and even speed of light.
  • Supports both imperial and metric units.
  • Accurate and instant results.
  • Free to use — no signup required.
  • Works smoothly on desktop, tablet and mobile.

Yes. The Speed Conversion Calculator is completely secure. It does not track or store any personal data — all calculations happen instantly in your browser.