Speed Converters

Convert kilometres per hour, miles per hour, knots and metres per second.

Four speed units cover most everyday needs: miles per hour on US roads, kilometres per hour almost everywhere else, metres per second in physics and sport, and feet per second where short distances matter, such as the fact that 60 mph is exactly 88 feet per second. The speed converter handles six units, including marine knots, and the pages below are shortcuts for specific pairs.

A few factors are worth remembering. One mile per hour is exactly 1.609344 km/h (mph to km/h) and 0.44704 m/s, and dividing km/h by 3.6 gives m/s (km/h to m/s). Multiplying km/h by 0.621371 gives mph (km/h to mph), and for a quick estimate a speed in km/h is about 60% higher than the same speed in mph. The pair pages return the answer rounded to six decimals and show the factor, so you can paste the result straight into a calculation.

Popular speed converters

• Speed ConverterSix speed units in one converter, from road speeds to knots.
• Mph to Kmh ConverterMiles per hour to km/h with the exact factor 1.609344.
• Kmh to Mph ConverterKilometres per hour to miles per hour.
• Km/h to m/s ConverterKilometres per hour to metres per second; divide by 3.6.

All speed converters

• Feet per second to Miles per hour ConverterType a speed in feet per second and the converter returns miles per hour, rounded to six decimals. Every foot per second is about 0.68 mph, and 88 fps is exactly 60 mph.
• Km/h to m/s ConverterEnter a speed in kilometers per hour and the converter returns meters per second, rounded to six decimals. Dividing by 3.6 does the same job by hand.
• Kmh to Mph ConverterEnter a speed in kilometers per hour and the converter shows the same speed in miles per hour. One km/h is about 0.621371 mph.
• Meters per second to Miles per hour ConverterType a speed in meters per second and the converter returns miles per hour, rounded to six decimal places. One m/s is about 2.236936 mph.
• Mph to Ft/s ConverterEnter a speed in miles per hour and the converter returns feet per second, rounded to six decimals. A useful anchor: 60 mph is exactly 88 feet every second.
• Mph to Kmh ConverterType a speed in miles per hour and the converter shows it in kilometers per hour. Each mile per hour equals exactly 1.609344 km/h.
• Mph to Mps ConverterType a speed in miles per hour and the converter fills in meters per second, rounded to six decimal places. One mph is exactly 0.44704 m/s.
• Mps to Kmh ConverterEnter a speed in meters per second and the converter shows kilometers per hour straight away, rounded to six decimals. The factor is exactly 3.6.
• Speed ConverterEnter a speed, choose the unit you have and the unit you want, and the answer appears at once with up to ten decimals. Six units are covered, from road speeds to marine knots.