Speed Converter
Speed Converter translates m/s, km/h, mph, and knot through metres per second. A knot means one nautical mile per hour, while mph uses the statute mile. The conversion handles scalar speed only; it does not include direction, acceleration, wind components, or travel-time planning.
Runs locally — files stay on your deviceHow many km/h is 1 m/s?
3.6 km/h.
Speed is distance divided by time
The tool uses 1 km/h = 1/3.6 m/s, 1 mph = 0.44704 m/s, and 1 knot = 0.514444 m/s.
How it works
Select a source and destination. The value is converted to metres per second, then scaled to the target unit.
Key concepts
Knot already means per hour
Write knot or kn, not knots per hour.
Velocity includes direction
This page converts magnitude only.
When to use it
- Compare road speeds.
- Translate marine or aviation knots.
- Convert laboratory m/s measurements.
When not to use it
- Do not confuse speed with velocity direction.
- Do not use statute mph as nautical miles per hour.
- Do not infer safe operating limits from a converted number.
Worked examples
Highway speed
- Input
60 mph- Expected output
96.56064 km/h
The exact statute-mile factor is used.
Metres per second
- Input
10 m/s- Expected output
36 km/h
Multiply by 3.6.
Marine speed
- Input
1 knot- Expected output
About 1.852 km/h
The stored knot factor is rounded to six decimals in m/s.
Common mistakes
Writing knots per hour
The time denominator is already part of knot. Correction: Use knot.
Mixing nautical and statute miles
They have different lengths. Correction: Use knots for nautical miles per hour.
Calling scalar speed velocity
Direction is absent. Correction: Include a vector direction separately.
Best practices
- Name the unit explicitly.
- Keep enough precision for the source measurement.
- Use domain-specific safety rules separately.
Related operations and differences
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Choose Area Converter when you need to convert common metric and imperial areas.; use Speed Converter specifically for convert.
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Energy Converter
Choose Energy Converter when you need to convert joules, calories and watt-hours.; use Speed Converter specifically for convert.
Fuel Economy Converter
Choose Fuel Economy Converter when you need to convert MPG, L/100 km and km/L.; use Speed Converter specifically for convert.
Length Converter
Choose Length Converter when you need to convert metric and imperial length units.; use Speed Converter specifically for convert.
Power Converter
Choose Power Converter when you need to convert watts, kilowatts and horsepower.; use Speed Converter specifically for convert.
Limitations and privacy
- No pace, Mach, acceleration, or vector direction.
- Stored knot factor is 0.514444 m/s.
- No environmental corrections.
Values are converted locally in this browser and are not uploaded.
Frequently asked questions
What is 1 m/s in km/h?
3.6 km/h.
What is a knot?
One nautical mile per hour.
Does mph use nautical miles?
No.
Does this calculate direction?
No.