Fast and Accurate Speed Unit Conversions

In a world where different regions and industries use different units, a reliable Speed Converter is an invaluable tool. Whether you're a pilot converting knots, a driver switching between MPH and KM/H, or a scientist working in meters per second, our tool delivers fast and precise conversions. It eliminates the need for manual calculations and helps you understand speed in the units you're most familiar with. This is the ultimate utility for anyone dealing with measurements of velocity.

Our tool supports all major speed units, including miles per hour (MPH), kilometers per hour (KM/H), meters per second (m/s), knots (kn), and feet per second (ft/s). The interface is designed for simplicity and efficiency, providing instant results with a single click.

How to Use the Speed Converter

1. Enter Your Speed: Type the speed value you want to convert into the "From" input field.
2. Select Units: Use the dropdown menus to choose your starting unit and the unit you want to convert to.
3. Click Convert: Press the "Convert Speed" button. The accurate result will immediately appear below.
4. Copy or Reset: Use the "Copy Result" button to save the value or "Clear All" to perform a new calculation.
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Frequently Asked Questions About Speed Conversion

How do you convert RPM to speed (mph or km/h)?

You cannot directly convert RPM (revolutions per minute) to a linear speed like mph or km/h without knowing the radius or diameter of the rotating object (e.g., a tire). The formula is: Speed = RPM × Circumference × 60. A larger tire will travel a greater distance per revolution, resulting in a higher speed for the same RPM. Our tool converts between standard linear speed units, not rotational speeds.

What is 4000 RPM in mph?

The speed in mph for 4000 RPM depends entirely on the size of the tire and the vehicle's gear ratio. For example, for a car with 25-inch diameter tires in a specific gear, 4000 RPM might equate to over 100 mph. For a smaller wheel, it would be much less. There is no single answer without more information.

How fast is 70 RPM in mph?

The speed for 70 RPM depends on the context. For a standard 26-inch bicycle wheel, 70 RPM translates to a speed of about 5.5 mph. For a much larger wheel, like on a tractor, 70 RPM would result in a higher linear speed.

How do you convert km to mph?

To convert kilometers per hour (km/h) to miles per hour (mph), you multiply the speed in km/h by the conversion factor 0.621371. The formula is: Speed in mph = Speed in km/h × 0.621371.

How fast is 100 km in mph?

Using the conversion factor, 100 kilometers per hour is equal to 62.14 miles per hour. You can get this by calculating 100 km/h × 0.621371 = 62.1371 mph.