Speed Converter

Convert between different units of speed and velocity

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✨ Speed Converter

Convert between different units of speed and velocity. No data leaves your browser – every conversion happens locally.

Common speed conversions

60 mph

= 96.6 km/h

100 km/h

= 62.1 mph

1 m/s

= 3.6 km/h

1 knot

= 1.852 km/h

30 mph

= 48.3 km/h

120 km/h

= 74.6 mph

One knot = 1 nautical mile per hour = 1.852 km/h. Used in aviation and maritime navigation. A plane cruising at 500 knots is doing about 926 km/h.

Multiply by 0.6 for a rough estimate. 100 km/h × 0.6 = 60 mph (actual is 62.1). Good enough for reading foreign speed limit signs.

299,792,458 m/s = about 1.08 billion km/h. Not a unit you'll convert often, but there it is.

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