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Speed Converter

Convert speed units. km/h, m/s, mph, knots and Mach. Includes all common units, instant results and examples.

Updated 2026 Data stays local

Note: These calculations are for informational purposes only and do not replace professional tax or financial advice. All information without guarantee.

Frequently Asked Questions

How do I convert km/h to m/s?

Divide km/h by 3.6 to get m/s, or multiply m/s by 3.6 to get km/h. For example, 100 km/h equals about 27.78 m/s.

What are common speed units?

km/h is used in most countries, mph in the UK and US, knots for nautical and aviation, Mach for supersonic speeds (1 Mach is approximately 1,235 km/h at sea level).

What is the Speed Converter?

The speed converter converts between km/h, m/s, mph, knots and other speed units.

How does the Speed Converter work?

Enter the value and source unit. The calculator converts to all common speed units.

Key Data and Facts

1 km/h = 0.2778 m/s. 1 mph = 1.609 km/h. 1 knot = 1.852 km/h. Speed of sound: approx. 1,235 km/h (Mach 1).

Step-by-Step Guide

How to use den Geschwindigkeits-Umrechner step by step: 1. Ausgangseinheit choose -- km/h, m/s, mph (Meilen pro hour), Knoten (kn) oder Mach. 2. Wert enter -- der Rechner konvertiert sofort in alle Einheiten. 3. Wichtige Umrechnungen: km/h in m/s = Wert / 3,6. mph in km/h = Wert * 1,609. Knoten in km/h = Wert * 1,852. 4. Mach-Zahl: Mach 1 = Schallgeschwindigkeit = ca. 1.235 km/h (auf Meereshoehe bei 20 Grad C). In Flughoehe (ca. -57 Grad C) betraegt Mach 1 nur ca. 1.062 km/h. 5. Haeufige Anwendungen: Tempolimits im Ausland umrechnen (65 mph = 104,6 km/h), Windgeschwindigkeiten von Knoten in km/h umwandeln (Beaufort 8 = ca. 34-40 kn = 63-74 km/h), Laufgeschwindigkeiten calculate. Tipp: Fuer schnelle km/h-zu-mph-Schaetzung den Wert durch 1,6 teilen (100 km/h ≈ 62 mph).

Calculation Example

130 km/h in mph: 130 / 1,609 = 80,8 mph. 25 Knoten in km/h: 25 * 1,852 = 46,3 km/h.

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