Enter a speed in knots to find its equivalent speed in meters per second.
Advanced options
This is the converted speed. The selected decimal places affect only the displayed rounding.
Multiply a speed in knots by this factor to get meters per second.
Table of contents
How to use our Knots to Meters per Second Converter
- Copy the speed from your source into "Speed in knots (kn, kt, or kts)".
- Enter a plain number, such as 12.5, or include a knot suffix, such as 12.5 kts.
- Open "Advanced options" and change "Result decimal places" only if your worksheet or report requires different rounding.
- Select "Calculate" to see the speed in meters per second.
- Check the supporting conversion factor if you want to multiply the knot value by hand.
Definitions
Knot (kn, kt, kts): A speed unit equal to one nautical mile per hour.
Meters per second (m/s): A speed unit showing how many meters an object travels in one second.
Conversion factor: The number multiplied by knots to get meters per second. One knot equals 463/900 m/s, about 0.5144444 m/s. [1]
Common mistakes and quick fixes
Mistake: Entering 1,01 to mean one point zero one knots.
Fix: Use a decimal point: enter 1.01. Use commas only for thousands separators, such as 1,000.
Mistake: Adding mph, km/h, or another non-knot unit after the number.
Fix: Enter a speed in knots. Accepted suffixes are kn, kt, kts, knot, and knots.
Mistake: Copying a rounded displayed answer when more precision is required.
Fix: Increase "Result decimal places" before calculating. This changes the displayed rounding, not the conversion.
Limitations & Key Assumptions / Boundary Conditions
- This converter accepts speed magnitude, so the entered value must be 0 or greater. It does not convert signed velocity or direction.
- The result changes units only. Wind, water current, direction, and ground speed can affect real movement but are not part of this calculation.
- Changing the selected decimal places changes only the displayed rounding. The converter keeps the unrounded value during calculation.
Methodology
Conversion method
One knot is one nautical mile per hour. A nautical mile is 1,852 meters, and an hour is 3,600 seconds, so one knot equals 1,852 divided by 3,600 meters per second. [1]
meters per second = knots x (1852 / 3600)
meters per second = knots x (463 / 900)
Worked example
For 10 knots, multiply 10 by 463/900. The unrounded result is 5.144444444... m/s. With three decimal places selected, the converter shows 5.144 m/s.
Rounding
The calculator multiplies first and rounds only the visible meters-per-second result. The supporting conversion factor is shown as 0.5144444 m/s per kn, rounded to seven decimal places.