Speed Converter

Convert km/h, mph, knots, m/s, and more — instantly.

Free speed unit converter. Convert km/h to mph, knots to mph, and more with exact factors. Use the express converter for any unit pair, or open a quick conversion below.

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1 kilometer per hour = 0.6213711923 miles per hour

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Popular conversions

Hand-picked pairs with dedicated converter pages — open one to convert instantly.

Kilometer per Hour → Mile per Hour

Kilometer per Hour to Mile per Hour

Mile per Hour → Kilometer per Hour

Mile per Hour to Kilometer per Hour

Meter per Second → Kilometer per Hour

Meter per Second to Kilometer per Hour

Kilometer per Hour → Meter per Second

Kilometer per Hour to Meter per Second

Mile per Hour → Meter per Second

Mile per Hour to Meter per Second

Meter per Second → Mile per Hour

Meter per Second to Mile per Hour

Knot → Mile per Hour

Knot to Mile per Hour

Mile per Hour → Knot

Mile per Hour to Knot

Knot → Kilometer per Hour

Knot to Kilometer per Hour

Kilometer per Hour → Knot

Kilometer per Hour to Knot

Meter per Second → Foot per Second

Meter per Second to Foot per Second

Foot per Second → Meter per Second

Foot per Second to Meter per Second

Mile per Hour → Foot per Second

Mile per Hour to Foot per Second

Foot per Second → Mile per Hour

Foot per Second to Mile per Hour

Knot → Meter per Second

Knot to Meter per Second

Meter per Second → Knot

Meter per Second to Knot

Mach (sea level, ~STP) → Mile per Hour

Mach (sea level, ~STP) to Mile per Hour

Mile per Hour → Mach (sea level, ~STP)

Mile per Hour to Mach (sea level, ~STP)

Browse all speed units

Pick any unit to open a two-way conversion. Mach uses a sea-level approximation (~340.29 m/s).

From

METER PER SECOND

1 m/s = 3.5999999997 km/h

meter per second (m/s) → kilometer per hour (km/h) kilometer per hour (km/h) → meter per second (m/s)

KILOMETER PER HOUR

1 km/h = 0.6213711923 mph

kilometer per hour (km/h) → mile per hour (mph) mile per hour (mph) → kilometer per hour (km/h)

MILE PER HOUR

1 mph = 1.6093439999 km/h

mile per hour (mph) → kilometer per hour (km/h) kilometer per hour (km/h) → mile per hour (mph)

METER PER HOUR

1 m/h = 0.0002777778 m/s

meter per hour (m/h) → meter per second (m/s) meter per second (m/s) → meter per hour (m/h)

METER PER MINUTE

1 m/min = 0.0166666667 m/s

meter per minute (m/min) → meter per second (m/s) meter per second (m/s) → meter per minute (m/min)

KILOMETER PER MINUTE

1 km/min = 16.6666666667 m/s

kilometer per minute (km/min) → meter per second (m/s) meter per second (m/s) → kilometer per minute (km/min)

KILOMETER PER SECOND

1 km/s = 1,000 m/s

kilometer per second (km/s) → meter per second (m/s) meter per second (m/s) → kilometer per second (km/s)

CENTIMETER PER HOUR

1 cm/h = 0.0000027778 m/s

centimeter per hour (cm/h) → meter per second (m/s) meter per second (m/s) → centimeter per hour (cm/h)

CENTIMETER PER MINUTE

1 cm/min = 0.0001666667 m/s

centimeter per minute (cm/min) → meter per second (m/s) meter per second (m/s) → centimeter per minute (cm/min)

CENTIMETER PER SECOND

1 cm/s = 0.01 m/s

centimeter per second (cm/s) → meter per second (m/s) meter per second (m/s) → centimeter per second (cm/s)

MILLIMETER PER HOUR

1 mm/h = 2.777778e-7 m/s

millimeter per hour (mm/h) → meter per second (m/s) meter per second (m/s) → millimeter per hour (mm/h)

MILLIMETER PER MINUTE

1 mm/min = 0.0000166667 m/s

millimeter per minute (mm/min) → meter per second (m/s) meter per second (m/s) → millimeter per minute (mm/min)

MILLIMETER PER SECOND

1 mm/s = 0.001 m/s

millimeter per second (mm/s) → meter per second (m/s) meter per second (m/s) → millimeter per second (mm/s)

FOOT PER HOUR

1 ft/h = 0.0000846667 m/s

foot per hour (ft/h) → meter per second (m/s) meter per second (m/s) → foot per hour (ft/h)

FOOT PER MINUTE

1 ft/min = 0.00508 m/s

foot per minute (ft/min) → meter per second (m/s) meter per second (m/s) → foot per minute (ft/min)

FOOT PER SECOND

1 ft/s = 0.3048 m/s

foot per second (ft/s) → meter per second (m/s) meter per second (m/s) → foot per second (ft/s)

YARD PER HOUR

1 yd/h = 0.000254 m/s

yard per hour (yd/h) → meter per second (m/s) meter per second (m/s) → yard per hour (yd/h)

YARD PER MINUTE

1 yd/min = 0.01524 m/s

yard per minute (yd/min) → meter per second (m/s) meter per second (m/s) → yard per minute (yd/min)

YARD PER SECOND

1 yd/s = 0.9144 m/s

yard per second (yd/s) → meter per second (m/s) meter per second (m/s) → yard per second (yd/s)

MILE PER MINUTE

1 mi/min = 26.8224 m/s

mile per minute (mi/min) → meter per second (m/s) meter per second (m/s) → mile per minute (mi/min)

MILE PER SECOND

1 mi/s = 1,609.344 m/s

mile per second (mi/s) → meter per second (m/s) meter per second (m/s) → mile per second (mi/s)

INCH PER SECOND

1 in/s = 0.0254 m/s

inch per second (in/s) → meter per second (m/s) meter per second (m/s) → inch per second (in/s)

KNOT

1 kn = 1.1507794479 mph

knot (kn) → mile per hour (mph) mile per hour (mph) → knot (kn)

KNOT (UK)

1 kn (UK) = 0.5147733333 m/s

knot (uk) (kn (UK)) → meter per second (m/s) meter per second (m/s) → knot (uk) (kn (UK))

MACH (SEA LEVEL, ~STP)

1 mach (sea level, ~stp) = 761.2070508232 mph

mach (sea level, ~stp) → mile per hour (mph) mile per hour (mph) → mach (sea level, ~stp)

MACH (20°C, 1 ATM)

1 mach (20°c, 1 atm) = 343.6 m/s

mach (20°c, 1 atm) → meter per second (m/s) meter per second (m/s) → mach (20°c, 1 atm)

MACH (SI STANDARD)

1 mach (si standard) = 295.0464000003 m/s

mach (si standard) → meter per second (m/s) meter per second (m/s) → mach (si standard)

VELOCITY OF LIGHT IN VACUUM

1 c = 299,792,458 m/s

velocity of light in vacuum (c) → meter per second (m/s) meter per second (m/s) → velocity of light in vacuum (c)

COSMIC VELOCITY — FIRST

1 v₁ = 7,900 m/s

cosmic velocity — first (v₁) → meter per second (m/s) meter per second (m/s) → cosmic velocity — first (v₁)

COSMIC VELOCITY — SECOND

1 v₂ = 11,200 m/s

cosmic velocity — second (v₂) → meter per second (m/s) meter per second (m/s) → cosmic velocity — second (v₂)

COSMIC VELOCITY — THIRD

1 v₃ = 16,670 m/s

cosmic velocity — third (v₃) → meter per second (m/s) meter per second (m/s) → cosmic velocity — third (v₃)

EARTH'S VELOCITY

1 v⊕ = 29,765 m/s

earth's velocity (v⊕) → meter per second (m/s) meter per second (m/s) → earth's velocity (v⊕)

VELOCITY OF SOUND IN PURE WATER

1 c_water = 1,482.7 m/s

velocity of sound in pure water (c_water) → meter per second (m/s) meter per second (m/s) → velocity of sound in pure water (c_water)

VELOCITY OF SOUND IN SEA WATER (20°C, 10 M)

1 c_sea = 1,521.6 m/s

velocity of sound in sea water (20°c, 10 m) (c_sea) → meter per second (m/s) meter per second (m/s) → velocity of sound in sea water (20°c, 10 m) (c_sea)