Meters per second.
m/s to Knots Converter — m/s to kn
Convert m/s (m/s) to Knots (kn) using the exact conversion factor (1 m/s = 1.943844492 knots). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
m/s to Knots converter
Converter
Speed Converter
Convert road, aviation, marine, lab, and scientific speed units.
Context values
Some unit families need one extra value for a physically accurate result.
A knot is one nautical mile per hour.
Result = input x 1 / 0.5144444444.
Speed uses meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting m/s to Knots
m/s and Knots both describe speed, and the conversion matters whenever a maritime or aviation speed (knots) needs to be compared against a road speed (mph). m/s is typically associated with standard scientific speed unit worldwide, while Knots is typically associated with used internationally in maritime navigation and aviation.
Formula
knots = m/s × 1.94384449244
This factor comes from each unit's defined relationship to the category's base unit: 1 m/s equals 1 base unit, and 1 knots equals 0.514444444444 base units, so dividing one by the other gives the direct m/s-to-knots factor of 1.94384449244.
Simple example
1 m/s × 1.943844492 = 1.943844492 kn
1 m/s = 1.943844492 knots.
Real-world example
10 m/s × 1.943844492 = 19.43844492 kn
10 m/s = 19.43844492 knots.
Conversion table
| m/s (m/s) | Knots (kn) |
|---|---|
| 1 m/s | 1.943844492 kn |
| 5 m/s | 9.719222462 kn |
| 10 m/s | 19.43844492 kn |
| 25 m/s | 48.59611231 kn |
| 50 m/s | 97.19222462 kn |
| 100 m/s | 194.3844492 kn |
Reverse conversion: Knots to m/s
1.943844492 kn × 0.5144444444 = 0.9999999998 m/s
1.943844492 knots = 0.9999999998 m/s.
m/s = knots × 0.514444444444
For a page dedicated to this direction, see Knots to m/s.
m/s vs. Knots
| Aspect | m/s | Knots |
|---|---|---|
| Family | SI derived unit | Non-SI unit accepted for use with SI (maritime/aviation) |
| Typical use | Scientific and engineering speed/velocity calculations | Ship and boat speed in marine navigation |
| Where it's used | Standard scientific speed unit worldwide | Used internationally in maritime navigation and aviation |
Understanding the m/s
m/s (m/s) measures speed. The meter per second is the SI derived unit of speed: one meter of distance per second of time. It is classified as a SI derived unit.
Where it's used: Standard scientific speed unit worldwide
Uses of the m/s today
- Scientific and engineering speed/velocity calculations
- Meteorology (wind speed, alongside km/h and knots)
- Physics education and calculations
History of the m/s
As a coherent SI derived unit, meters per second follows automatically from the meter and second, the SI base units of length and time, without an independent historical origin.
Historical origin. m/s was not the invention of a single named person; it developed through the process described above.
Understanding the Knots
Knots (kn) measures speed. A knot is one nautical mile per hour; since the nautical mile is exactly 1,852 meters, a knot is exactly 1,852/3,600 m/s. It is classified as a Non-SI unit accepted for use with SI (maritime/aviation).
Where it's used: Used internationally in maritime navigation and aviation
Uses of the Knots today
- Ship and boat speed in marine navigation
- Aircraft airspeed and wind speed reporting in aviation
- Marine weather forecasts (wind speed)
History of the Knots
The knot gets its name from an old nautical method of measuring speed: sailors trailed a 'log line' with evenly spaced knots behind a ship and counted how many knots paid out over a fixed time, giving a direct speed reading in 'knots.'
The nautical mile it's based on was itself standardized internationally in 1929 (the International Nautical Mile, 1,852 m exactly), tying the knot to a precise value still used in shipping and aviation today.
Historical origin. Knots was not the invention of a single named person; it developed through the process described above.
m/s — sources
- BIPM SI Brochure — Coherent derived units — Defines m/s as the SI unit of speed.
Knots — sources
- BIPM SI Brochure — Non-SI units accepted for use with SI — Lists the knot among accepted non-SI speed units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many knots are in 1 m/s?
1 m/s equals 1.943844492 knots, using the exact defined conversion factor rather than an estimate.
How do I convert m/s to knots?
Multiply the m/s value by 1.943844492. The converter above does this instantly to whatever precision you set.
How do I convert knots back to m/s?
Use the reverse factor: 1 knots equals 0.5144444444 m/s. You can also use the swap control in the converter above to flip the direction instantly.
What is a m/s?
m/s (m/s) measures speed. The meter per second is the SI derived unit of speed: one meter of distance per second of time. It is classified as a SI derived unit.
What is a knots?
Knots (kn) measures speed. A knot is one nautical mile per hour; since the nautical mile is exactly 1,852 meters, a knot is exactly 1,852/3,600 m/s. It is classified as a Non-SI unit accepted for use with SI (maritime/aviation).
Is the m/s to knots conversion exact?
Yes. A knot is one nautical mile per hour; since the nautical mile is exactly 1,852 meters, a knot is exactly 1,852/3,600 m/s. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
Where is the m/s still used today?
Standard scientific speed unit worldwide