Kilometers per Hour to Meters per Second converter (km/h → m/s)

km/h to m/s formula

Worked example: 1 km/h = 0.2778 m/s. The defining value behind this factor is documented on our speed & velocity standards page.

Kilometers per Hour to Meters per Second chart

Includes standard reference values plus the specific numbers people search for most.

Most-searched km/h to m/s answers

When to convert km/h to m/s

• ▸Driving — speed limits are posted in km/h in some countries and m/s in others; 333462 km/h on the dashboard is a different number in m/s.
• ▸Running & cycling pace — Strava, Garmin and Apple Watch let you toggle between km/h and m/s.
• ▸Aviation & maritime — pilots and captains speak in knots; converting to km/h or m/s matters for ground-speed comparisons.
• ▸Sports commentary — pitching, tennis serves and sprint speeds mix km/h and m/s across broadcasts.

Common mistakes

• ✕Confusing mph with knots when reading marine or aviation data.
• ✕Assuming km/h and m/s scale like distance when acceleration is involved — speed conversion is linear, but pace (min/km vs min/mi) is inverse.
• ✕Knots are not 'nautical km/h'. A knot is one nautical mile per hour = 1.852 km/h exactly. Reading a knot as a km/h value understates speed by about 85%, which matters for aviation and marine figures.

Regional usage & source

km/h is used on road signs in most countries. mph is the US and UK standard on roads. m/s is standard in physics and sports (athletics). Knots (nautical miles per hour) are standard in aviation and maritime.

Reference: 1 mile per hour = 1.609344 km/h exactly. 1 knot = 1.852 km/h (International Hydrographic Organisation).

How these numbers are produced and rounded: methodology.

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