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A speed converter is the quickest way to translate a speed limit from one unit to another. Whether you are driving in a foreign country, reading a weather report with wind speeds in knots, or solving a physics problem in meters per second, this tool eliminates the mental math.
For a broader overview of all speed tools, see our pillar post on speed calculators . If you need the core distance-time-speed formula, read our speed distance time calculator guide .
Common Speed Conversions
The most frequent conversion a speed converter handles is miles per hour to kilometers per hour. To convert mph to km/h, multiply by 1.609. So 60 mph is roughly 97 km/h. To convert km/h to mph, divide by 1.609. A 100 km/h speed limit is approximately 62 mph.
For boating and aviation, knots are standard. One knot equals one nautical mile per hour. A speed converter changes mph to knots using the factor 0.869. A 50 mph wind translates to about 43 knots. For scientific and athletic use, meters per second often appears. To convert km/h to m/s, divide by 3.6. A 36 km/h sprint works out to exactly 10 m/s.
Using an Online Speed Converter
An online speed converter lets you enter any value and instantly see the equivalent in every common unit. You simply type in your number, select the original unit, and the tool displays all the conversions at once. This saves you from memorizing multiple conversion factors and prevents arithmetic errors.
For runners who prefer minutes per mile, our running pace calculator guide converts speed into pace. For trips with varying speeds, our average speed calculator guide helps you find your true overall pace.
