What is 1 knot in meters per second?

1 knot equals exactly 0.514444 m/s. This is derived from the international nautical mile (1,852 m) divided by 3,600 seconds: 1852 ÷ 3600 = 0.51444...

Why are speed at sea and in aviation measured in knots?

Knots are tied to nautical miles, which are defined by Earth's longitude (1 arcminute ≈ 1,852 m). This makes navigation calculations on spherical charts straightforward — 1 knot over 1 hour covers exactly 1 nautical mile.

How do I convert m/s back to knots?

Divide the m/s value by 0.514444, or equivalently multiply by 1.94384. For example, 10 m/s ÷ 0.514444 ≈ 19.44 kn.

What is a typical cruising speed in knots and m/s?

A typical cargo ship cruises at 10–14 kn (5.1–7.2 m/s). A commercial airliner at cruise altitude travels at roughly 450–500 kn (231–257 m/s), near Mach 0.8.

Is the conversion exact?

Yes. The international nautical mile is defined as exactly 1,852 m, so 1 kn = 1852/3600 m/s = 0.5144̄ m/s (0.514444... with the digit 4 repeating). This converter uses the full precision available in 64-bit floating point.

Knots to Meters per Second Converter

Name: Knots to Meters per Second Converter
Availability: InStock
Author: Nham Vu

Convert knots (kn) to meters per second (m/s) instantly, with a reference table for common values used in aviation and maritime navigation.

Convert Knots to m/s

Speed in knots (kn)

Speed in meters per second (m/s)

About Knots & m/s

Exact conversion factor: 1 kn = 1852 ÷ 3600 m/s ≈ 0.514444 m/s
Reverse: m/s to kn: 1 m/s = 3600 ÷ 1852 kn ≈ 1.94384 kn
Why knots?: 1 knot = 1 nautical mile per hour. A nautical mile equals 1 arcminute of latitude (1,852 m), making chart navigation arithmetic simple.
Typical speeds: Context kn m/s

Gentle breeze 7 3.60

Ferry boat 15 7.72

Cargo ship (cruise) 12 6.17

Category 1 hurricane 65 33.44

Small aircraft 120 61.73

Airliner (cruise) 480 246.93

Context	kn	m/s
Gentle breeze	7	3.60
Ferry boat	15	7.72
Cargo ship (cruise)	12	6.17
Category 1 hurricane	65	33.44
Small aircraft	120	61.73
Airliner (cruise)	480	246.93

Reference Table — Knots to m/s

Common values from 1 kn to 200 kn

Knots (kn)	Meters / second (m/s)	Knots (kn)	Meters / second (m/s)

Summary

Convert knots (kn) to meters per second (m/s) instantly, with a reference table for common values used in aviation and maritime navigation.

How it works

Enter a speed in knots in the input field.
The converter multiplies your value by 0.514444 (the exact kn → m/s factor).
The result in meters per second appears instantly.
Use the reference table below the converter for common benchmarks.
Click "Copy" to copy the m/s result to your clipboard.

Use cases

Convert wind speed reports from knots to m/s for physics or engineering models.
Translate ship or aircraft speed from knots to SI units for scientific calculations.
Cross-check weather station data that mixes knot and m/s readings.
Convert maritime chart speeds to m/s for fluid-dynamics simulations.
Prepare data for CFD (computational fluid dynamics) software that requires m/s.
Verify manual conversions when working with nautical navigation tables.

Frequently Asked Questions

Last updated: 2026-07-23 · Reviewed by Nham Vu