Convert Feet per Second Squared to Knots per Second
Foot per Second Squared (ft/s²) to Knot per Second (kn/s) unit conversion — enter any value below to get an instant result, or use the table for common values.
Results from this calculator are estimates provided for general informational purposes only, based on formulas, rates, and standards commonly accepted as of 2026. Figures may differ slightly from other calculators or professional sources due to rounding methods, differing assumptions, or regional regulations, and rules may change over time. Always consult a qualified professional — such as a financial advisor, healthcare provider, or other relevant specialist — before making decisions based on these results.
Result
1 ft/s² = 0.5924838 kn/s
1 Foot per Second Squared = 0.5924838 Knots per Second
1 Knot per Second = 1.6878099 Feet per Second Squared
1 ft/s² in every supported unit
Conversion chart: Foot per Second Squared to Knots per Second
Conversion table
| Foot per Second Squared (ft/s²) | Knot per Second (kn/s) |
|---|---|
| 0.01 ft/s² | 0.005924838 kn/s |
| 0.1 ft/s² | 0.05924838 kn/s |
| 1 ft/s² | 0.5924838 kn/s |
| 2 ft/s² | 1.1849676 kn/s |
| 3 ft/s² | 1.7774514 kn/s |
| 5 ft/s² | 2.962419 kn/s |
| 10 ft/s² | 5.924838 kn/s |
| 20 ft/s² | 11.849676 kn/s |
| 50 ft/s² | 29.62419 kn/s |
| 100 ft/s² | 59.24838 kn/s |
| 1000 ft/s² | 592.4838 kn/s |
Foot per Second Squared (ft/s²)
Definition: A US customary unit of acceleration describing how many feet per second of speed an object gains each second.
History: Derived directly from the foot and second, the base units of the older English/imperial measurement tradition, once engineers needed an acceleration unit consistent with everyday US length and time measurements.
Current use: Used in US aerospace and ballistics engineering, as well as introductory physics education in the United States where distances are commonly taught in feet.
Knot per Second (kn/s)
Definition: A nautical/aviation acceleration unit describing how many knots (nautical miles per hour) of speed a vessel or aircraft gains each second.
History: Built from the knot, the standard speed unit in maritime and aviation navigation since the era of ships measuring speed with a knotted log line trailed behind the vessel.
Current use: Used in aviation and marine engineering to describe acceleration during takeoff runs, catapult launches, or rapid maneuvering, where speed is already tracked in knots.
Supported Units
| Unit | Symbol | In Meters per Second Squared |
|---|---|---|
| Meter per Second Squared | m/s² | 1 m/s² |
| Kilometer per Hour per Second | km/(h·s) | 0.27777778 m/s² |
| Standard Gravity | g | 9.80665 m/s² |
| Galileo | Gal | 0.01 m/s² |
| Foot per Second Squared | ft/s² | 0.3048 m/s² |
| Inch per Second Squared | in/s² | 0.0254 m/s² |
| Mile per Second Squared | mi/s² | 1609.344 m/s² |
| Mile per Hour per Second | mph/s | 0.44704 m/s² |
| Knot per Second | kn/s | 0.51444444 m/s² |
| Yard per Second Squared | yd/s² | 0.9144 m/s² |
About These Parameters
- Value
- The acceleration value you want to convert, expressed in the "From" unit. Accepts decimals.
- From Unit
- The acceleration unit your input value is currently measured in — for example, standard gravity (g) for a crash-test rating or mph per second for a car's acceleration figure.
- To Unit
- The acceleration unit you want the result converted into. Use the swap button to flip From and To instantly.
How Acceleration Conversion Works
The Formula
Every unit here is defined by a fixed multiplier relative to the meter per second squared. To convert a value from one unit to another:
result = value × (factor of "From" unit ÷ factor of "To" unit)
For Foot per Second Squared → Knot per Second: multiply by 0.5924838. For example, 1 ft/s² × 0.5924838 = 0.5924838 kn/s.
Why Standard Gravity (g) Is a Natural Reference Unit
Standard gravity, fixed at exactly 9.80665 m/s², is the acceleration a falling object experiences at Earth's surface — and, not coincidentally, the acceleration a human body feels as ordinary weight while standing still. Because every person has an intuitive sense of what "1 g" feels like, aerospace engineers, roller coaster designers, and crash-test analysts describe extreme accelerations as multiples of g (fighter pilots may black out around 8-9 g) rather than in raw meters per second squared, which carries no built-in point of reference.
Acceleration vs. Velocity vs. Speed
Speed and velocity describe how fast something is moving right now; acceleration describes how quickly that speed is changing. A car cruising steadily at 65 mph on a highway has velocity but zero acceleration, while the same car merging onto the highway and speeding up from 0 to 65 mph in 8 seconds has significant acceleration during that interval. This is exactly why vehicle acceleration is commonly reported as a 0-60 time rather than a single number — the underlying acceleration unit (like mph per second here) captures the rate of change directly.
Example
1 ft/s² equals 0.5924838 kn/s. For scale, that's about 0.03× standard gravity (1 g, or 32.174049 ft/s²) — a typical car accelerating from 0 to 60 mph in 8 seconds averages roughly 0.34 g, while a commercial jet's takeoff roll is usually under 0.5 g.
Frequently Asked Questions
How many Knots per Second are in 1 Foot per Second Squared?
1 Foot per Second Squared (ft/s²) equals exactly 0.5924838 Knots per Second (kn/s).
What does "1 g" actually mean?
One g is standard gravity, fixed at exactly 9.80665 m/s² — the acceleration you experience due to Earth's gravity while standing still. It's used as a reference unit because it corresponds to a feeling everyone already knows: your own body weight. An acceleration of 2 g feels like being pressed down with twice your normal weight.
How is a car's 0-60 mph time related to acceleration?
A 0-60 mph time is a snapshot of average acceleration over that interval — divide 60 mph by the number of seconds it took to get the average mph-per-second acceleration. A car that reaches 60 mph in 6 seconds is averaging 10 mph/s (about 0.45 g), though actual acceleration is usually stronger at lower speeds and tapers off as the car approaches 60 mph.
How accurate are these conversions?
Every conversion factor used here is the exact, internationally recognized value (e.g. standard gravity is fixed at exactly 9.80665 m/s², and 1 mile = exactly 1,609.344 m) — results are limited only by floating-point display precision, not by rounded conversion constants.