A speed converter makes unit changes fast and reliable. Whether you need a speed converter to mph for road travel, a speed converter from miles to km for international trips, or a driving speed converter to check limits, this online tool handles every calculation. Our free tool is simple: enter a value, pick units, and get instant results.
If you’re working with data, the internet speed converter converts bits per second to Mbps or MB/s. Creators will value the video speed converter that adjusts playback rates for editing or review. For aviation and marine uses, the speed converter kts to km option converts knots to km/h and supports precise velocity conversion for navigation.
How conversion works & formulas
At the core is a simple speed conversion formula: convert the input to a base unit (usually meters per second), then scale to the desired unit.
For quick references, remember this:
1 m/s = 3.6 km/h
1 m/s ≈ 2.23694 mph
The tool includes a speed conversion chart, a meters per second calculator, and a feet per second calculator so you can verify conversions or learn how to calculate speed by hand (speed = distance ÷ time).
Need concrete numbers?
- What is 70 mph in km? 70 mph converts to about 112.65 km/h.
- How fast is 350 km in mph? 350 km/h is roughly 217.48 mph.
- For speed conversion to Mach, note that Mach 1 changes with altitude and temperature, but at sea level it’s near 1235 km/h.
How does the converter compute values?
It standardizes your input to a base unit and then applies the appropriate multiplier for the target unit, ensuring accuracy across convert speed scenarios.
How many kilometers is 70 mph?
70 mph is approximately 112.65 km/h. You can check this with the miles per hour calculator.
Convert 350 km/h to mph. How fast is that?
350 km/h is approximately 217.48 mph. Use the online speed calculator for instant conversion.
What’s the simplest method to convert speeds?
Open the Speed Converter, choose source and target units, enter the number, and get results—no manual math required.