Knot to Foot per second Converter
Convert knots to feet per second with our free online speed converter.
Quick Answer
1 Knot = 1.68781 feet per second
Formula: Knot × conversion factor = Foot per second
Use the calculator below for instant, accurate conversions.
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All conversion formulas on UnitsConverter.io have been verified against NIST (National Institute of Standards and Technology) guidelines and international SI standards. Our calculations are accurate to 10 decimal places for standard conversions and use arbitrary precision arithmetic for astronomical units.
Knot to Foot per second Calculator
How to Use the Knot to Foot per second Calculator:
- Enter the value you want to convert in the 'From' field (Knot).
- The converted value in Foot per second will appear automatically in the 'To' field.
- Use the dropdown menus to select different units within the Speed category.
- Click the swap button (⇌) to reverse the conversion direction.
How to Convert Knot to Foot per second: Step-by-Step Guide
Converting Knot to Foot per second involves multiplying the value by a specific conversion factor, as shown in the formula below.
Formula:
1 Knot = 1.68781 feet per secondExample Calculation:
Convert 60 knots: 60 × 1.68781 = 101.2686 feet per second
Disclaimer: For Reference Only
These conversion results are provided for informational purposes only. While we strive for accuracy, we make no guarantees regarding the precision of these results, especially for conversions involving extremely large or small numbers which may be subject to the inherent limitations of standard computer floating-point arithmetic.
Not for professional use. Results should be verified before use in any critical application. View our Terms of Service for more information.
Need to convert to other speed units?
View all Speed conversions →What is a Knot and a Foot per second?
The Mathematical Definition
1 Knot = 1 Nautical Mile per Hour
In SI Units: $$ 1 \text{ knot} = 1.852 \frac{\text{km}}{\text{h}} = 0.514444 \frac{\text{m}}{\text{s}} $$
In Imperial Units: $$ 1 \text{ knot} = 1.15078 \frac{\text{miles}}{\text{hour}} = 1.68781 \frac{\text{feet}}{\text{second}} $$
Why the Nautical Mile?
The nautical mile is not arbitrary—it's based on the Earth's geometry.
Definition: One nautical mile = one minute of latitude along a meridian.
The Math:
- Earth's circumference ≈ 40,075 km (at equator).
- 360 degrees × 60 minutes/degree = 21,600 minutes around the Earth.
- 40,075 km ÷ 21,600 = 1.855 km per minute of latitude.
- Standardized to exactly 1.852 km (1,852 meters).
Why This Matters: If you're at 40°N latitude and sail due north at 60 knots for 1 hour, you'll be at 41°N latitude. The math is perfect for navigation.
Knot vs. Statute Mile
| Unit | Length | Use | |------|--------|-----| | Nautical Mile | 6,076 feet (1,852 m) | Maritime, aviation navigation | | Statute Mile | 5,280 feet (1,609 m) | Land travel (cars, roads) | | Difference | 796 feet longer | Nautical mile is 15% longer |
and Standards
The foot per second is defined as:
US Customary Definition
1 ft/s = the velocity of a body that travels a distance of one foot in a time interval of one second.
Formula: v (ft/s) = distance (feet) / time (seconds)
Exact SI conversion (since 1959 International Yard and Pound Agreement):
- 1 ft/s = 0.3048 m/s (exactly)
- 1 foot = 0.3048 meters (exactly)
Why ft/s Instead of mph?
Time scale appropriateness: Many technical applications involve sub-second events:
- Ballistics: Bullet flight time measured in milliseconds (0.001 seconds)
- Reaction distance: Driver reaction (1-2 seconds) × speed in ft/s = distance in feet
- Hydraulics: Flow velocities through pipes/channels measured continuously, not per hour
Intuitive scale for small objects:
- "Arrow travels 300 ft/s" vs "arrow travels 205 mph"—ft/s gives clearer sense of per-second distance
- Easier mental math: "How far does projectile travel in 0.1 seconds?" → 30 feet (at 300 ft/s)
Engineering calculations: US hydraulic formulas (Manning's, Darcy-Weisbach) use ft/s natively
Standard Conversions
Imperial/US conversions:
- 1 ft/s = 0.681818 mph (or 15/22 mph exactly)
- 1 ft/s = 3,600 feet/hour
- 1 ft/s = 720 feet/minute
Key conversion (memorize):
- 60 mph = 88 ft/s (exactly: 60 × 5,280 ÷ 3,600 = 88)
- 1 mph = 1.46667 ft/s (or 22/15 exactly)
Metric conversions:
- 1 ft/s = 0.3048 m/s (exactly)
- 1 ft/s = 1.09728 km/h
- 1 ft/s = 30.48 cm/s
Marine/aviation:
- 1 ft/s = 0.592484 knots
- 1 ft/s = 0.000888 Mach (at sea level, 68°F)
Relationship to Acceleration
Feet per second squared (ft/s²) measures acceleration:
- Gravity: g = 32.174 ft/s² (standard gravity, often rounded to 32.2 ft/s²)
- Car acceleration: 0-60 mph in 5 seconds = 88 ft/s ÷ 5 = 17.6 ft/s² average
- Comparison: SI gravity = 9.80665 m/s²
Note: The Knot is part of the imperial/US customary system, primarily used in the US, UK, and Canada for everyday measurements. The Foot per second belongs to the imperial/US customary system.
History of the Knot and Foot per second
: From Rope Knots to GPS
Ancient Navigation (Before 1500s)
Before the knot, sailors had no reliable way to measure speed. They used:
- Dead Reckoning: Estimating speed by watching foam, debris, or seaweed pass the ship.
- Guesswork: Experienced sailors "felt" the speed.
This led to massive navigation errors. Ships would miss islands, run aground, or get hopelessly lost.
The Chip Log Invention (1600s)
The chip log (or common log) revolutionized navigation.
Components:
- The Chip: A triangular wooden board weighted to float upright.
- The Log Line: A rope with knots tied at intervals of 47 feet 3 inches (14.4 meters).
- The Sandglass: A 28-second or 30-second timer.
The Process:
- Sailor throws the chip overboard from the stern.
- The chip stays relatively stationary in the water (drag keeps it in place).
- As the ship sails away, the log line unspools.
- Another sailor flips the sandglass.
- A third sailor counts the knots passing through his hands.
- When the sand runs out, they note the count: "7 knots!"
The Math: The knot spacing (47 ft 3 in) and timing (28-30 sec) were calibrated so that:
- 1 knot on the line = 1 nautical mile per hour of ship speed.
Example:
- If 7 knots passed in 30 seconds, the ship was traveling at 7 knots (7 nautical miles per hour).
Why "47 Feet 3 Inches"?
This seems random, but it's brilliant math:
- 1 nautical mile = 6,076 feet.
- 1 hour = 3,600 seconds.
- 30 seconds = 1/120 of an hour.
- 6,076 ÷ 120 = 50.63 feet.
Early sailors used 47 feet 3 inches (close enough) because it was easier to measure with the tools available.
Modern Standardization (1929)
The International Hydrographic Bureau standardized the nautical mile to exactly 1,852 meters in 1929. This fixed the knot at exactly 1.852 km/h.
Today:
- Ships use GPS and electronic speed logs.
- The chip log is obsolete, but the term "knot" remains universal.
and Evolution
Ancient Feet to Modern Standardization
The foot through history:
- Ancient civilizations: Egyptian, Greek, Roman feet varied (285-335 mm)
- Roman pes: ~296 mm (11.65 inches)—basis for many European feet
- Medieval England: Multiple feet existed regionally (London foot, York foot)
- 1588: Queen Elizabeth I attempted standardization
- 1824: British Imperial system defined foot as 1/3 yard
- 1959: International Yard and Pound Agreement defined 1 foot = 0.3048 meters exactly
The second:
- Originally: 1/86,400 of mean solar day (Earth's rotation)
- 1967: Redefined using cesium-133 atomic transition (9,192,631,770 cycles = 1 second)
- Modern definition independent of Earth's rotation (which varies slightly)
The Foot-Pound-Second (FPS) System
British engineering standard (1800s-1960s):
- Length: foot (ft)
- Mass: pound (lb)
- Time: second (s)
- Force: poundal (1 lb·ft/s²) or pound-force (lbf)
- Energy: foot-poundal or foot-pound-force (ft·lbf)
- Velocity: feet per second (ft/s)
FPS system applications:
- Railway engineering: Train speeds, braking distances
- Ballistics: Muzzle velocity, projectile range calculations
- Hydraulics: Water flow in pipes, channels, rivers
- Structural engineering: Wind loads, beam deflections
Decline and persistence:
- 1960: SI system established internationally
- 1970s-1980s: Most countries transitioned to metric
- US holdout: American industry, construction, and firearms sectors retained FPS
- Current: US ballistics universally uses ft/s; engineering mixed (metric in automotive/aerospace, imperial in civil/construction)
Ballistics and the ft/s Standard
Why ballistics uses ft/s:
- Historical momentum: 19th-century firearms development used FPS system
- Industry standardization: Millions of existing specifications in ft/s
- Practical scale: 1,000-3,000 ft/s range fits projectile velocities well
- Reloading data: Powder charge tables, pressure curves all in imperial units
Ammunition velocity standards (all in ft/s):
- .22 LR: 1,200-1,700 ft/s
- 9mm Luger: 1,100-1,300 ft/s
- .45 ACP: 800-900 ft/s
- .223 Remington / 5.56 NATO: 3,000-3,300 ft/s
- .308 Winchester / 7.62 NATO: 2,600-2,800 ft/s
- .50 BMG: 2,800-3,000 ft/s
Chronograph measurements: All ballistic chronographs (devices measuring projectile speed) display in ft/s in US market.
US Hydraulic Engineering
Manning's Equation (open channel flow): v = (1.49/n) × R^(2/3) × S^(1/2)
Where:
- v = velocity in ft/s
- n = Manning's roughness coefficient
- R = hydraulic radius in feet
- S = channel slope (dimensionless)
Note: The 1.49 coefficient is specific to ft/s (metric version uses 1.0 with m/s)
US civil engineering applications:
- Storm drainage design
- Sanitary sewer sizing
- Irrigation canal design
- River and stream analysis
- Flood control structures
Persistence reason: US infrastructure built over 150+ years using imperial units—retrofitting millions of engineering drawings impractical.
Driver Education and Safety
The "60 mph = 88 ft/s" Rule:
Used universally in US driver education to teach reaction distance:
Reaction time (typical): 1.5 seconds Distance traveled (at 60 mph): 1.5 × 88 = 132 feet before braking begins
Stopping distance breakdown (60 mph on dry pavement):
- Reaction distance: 132 feet (time to perceive, react, move foot to brake)
- Braking distance: ~180 feet (actual braking to stop)
- Total stopping distance: ~312 feet (longer than a football field!)
Why ft/s is better than mph for this:
- Intuitive: "I travel 88 feet every second at highway speed"
- Easy calculation: seconds × ft/s = feet
- Using mph requires: mph × 1.467 × seconds = feet (harder mental math)
Common Uses and Applications: knots vs feet per second
Explore the typical applications for both Knot (imperial/US) and Foot per second (imperial/US) to understand their common contexts.
Common Uses for knots
1. Maritime Navigation
Why Knots?
- Chart Compatibility: Nautical charts use latitude/longitude. 1 knot = 1 minute of latitude per hour.
- Mental Math: Easy to calculate distance and time.
- Universal Standard: All ships worldwide use knots.
Example:
- "We're at 40°N, heading north at 30 knots."
- "In 2 hours, we'll be at 41°N." (30 knots × 2 hours = 60 nautical miles = 1 degree).
2. Aviation Navigation
Why Pilots Use Knots:
- International Standard: All air traffic control uses knots.
- Wind Reports: "Winds 270 at 15 knots" (from west at 15 knots).
- True Airspeed vs. Ground Speed: Pilots calculate wind correction using knots.
Example:
- True Airspeed: 450 knots (speed through air).
- Headwind: 50 knots.
- Ground Speed: 400 knots (speed over ground).
3. Meteorology
Wind Speed Reporting:
- Surface Winds: Reported in knots for marine forecasts.
- Upper-Level Winds: Jet stream speeds in knots (can reach 200+ knots).
- Hurricane Intensity: Measured in knots (64+ knots = hurricane).
4. Oceanography
Ocean Currents:
- Gulf Stream: Flows at 3-5 knots (fastest ocean current).
- Tidal Currents: Can reach 5-10 knots in narrow straits.
When to Use feet per second
Across Industries
Ballistics and Firearms
- Ammunition specifications: All US ammo rated in ft/s muzzle velocity
- Chronograph testing: Velocity measurement devices display ft/s
- Ballistic calculators: Trajectory prediction software requires ft/s input
- Reloading data: Powder charge tables show expected ft/s velocities
Archery and Hunting
- Bow performance: IBO (International Bowhunting Organization) speed ratings in ft/s
- Arrow selection: Spine charts factor in bow speed (ft/s)
- Kinetic energy calculations: KE = (arrow weight × velocity²) ÷ 450,240 (weight in grains, velocity in ft/s → energy in foot-pounds)
US Civil Engineering
- Open channel flow: Manning's equation uses ft/s for rivers, canals, drainage
- Storm water management: Inlet design, detention pond sizing
- Sanitary sewer design: Minimum 2 ft/s to prevent settling
- Flood analysis: Peak flow velocities in ft/s
Driver Education and Safety
- Reaction distance teaching: "At 60 mph, you travel 88 feet every second"
- Following distance: "3-second rule" = 3 × 88 = 264 feet at 60 mph
- Crash reconstruction: Skid mark analysis uses ft/s for velocity calculations
Sports Science
- Baseball/softball: Pitch speed tracking (radar guns display ft/s or mph)
- Golf: Launch monitors measure clubhead and ball speed in ft/s
- Track and field: Sprint speeds converted to ft/s for analysis
Aviation (Limited Use)
- Rate of climb/descent: Feet per minute (fpm), but convertible to ft/s
- Ground speed calculations: Sometimes expressed in ft/s for short-field operations
- Note: Aviation primarily uses knots (nautical miles per hour)
Additional Unit Information
About Knot (kn)
Why do planes and ships use knots instead of mph?
Historical Reason:
- Early aviation borrowed from maritime tradition.
- Pilots and sailors both navigate using latitude/longitude.
Practical Reason:
- 1 knot = 1 minute of latitude per hour makes navigation calculations trivial.
- Using mph would require constant conversion (1 degree latitude ≈ 69 statute miles).
Example:
- Knots: "Flying north at 60 knots for 1 hour = 1 degree north."
- mph: "Flying north at 69 mph for 1 hour = 1 degree north." (Awkward!)
Is saying "knots per hour" correct?
No! This is a common mistake.
Wrong: "The ship is doing 20 knots per hour." Right: "The ship is doing 20 knots."
Why?
- Knot already means "nautical miles per hour."
- Saying "knots per hour" is like saying "miles per hour per hour" (which is acceleration, not speed).
How do I convert knots to mph mentally?
Quick Method: Add 15%
Steps:
- Take the knot value (e.g., 40 knots).
- Calculate 10%: 40 × 0.1 = 4.
- Calculate 5% (half of 10%): 4 ÷ 2 = 2.
- Add them: 40 + 4 + 2 = 46 mph.
- (Actual: 46.03 mph—very close!)
What is the fastest speed ever recorded in knots?
Water Speed Record:
- 276 knots (317 mph) by Spirit of Australia (1978).
- Jet-powered hydroplane.
Air Speed Record (Manned):
- 1,905 knots (2,193 mph, Mach 3.3) by SR-71 Blackbird.
Wind Speed Record:
- 253 knots (291 mph) measured during Tropical Cyclone Olivia (1996) in Australia.
Do cars ever use knots?
No. Cars use:
- mph (miles per hour) in the US, UK.
- km/h (kilometers per hour) everywhere else.
Knots are exclusively for maritime and aviation use.
Why is a nautical mile longer than a statute mile?
Statute Mile: Based on Roman measurements (1,000 paces = 5,280 feet). Arbitrary.
Nautical Mile: Based on Earth's geometry (1 minute of latitude = 6,076 feet). Scientific.
The nautical mile is 15% longer because it's tied to the planet's actual size.
How fast is the wind in a hurricane?
Hurricane Categories (Saffir-Simpson Scale):
| Category | Wind Speed (Knots) | Wind Speed (mph) | Damage | |----------|-------------------|------------------|--------| | Tropical Storm | 34-63 knots | 39-73 mph | Minimal | | Category 1 | 64-82 knots | 74-95 mph | Some damage | | Category 2 | 83-95 knots | 96-110 mph | Extensive damage | | Category 3 | 96-112 knots | 111-129 mph | Devastating | | Category 4 | 113-136 knots | 130-156 mph | Catastrophic | | Category 5 | 137+ knots | 157+ mph | Total destruction |
Threshold: A tropical storm becomes a hurricane at 64 knots (74 mph).
What is a "gale" in knots?
Beaufort Wind Scale:
| Force | Name | Wind Speed (Knots) | Conditions | |-------|------|-------------------|------------| | 7 | Near Gale | 28-33 | Difficult to walk | | 8 | Gale | 34-40 | Twigs break off trees | | 9 | Strong Gale | 41-47 | Roof damage | | 10 | Storm | 48-55 | Trees uprooted | | 11 | Violent Storm | 56-63 | Widespread damage | | 12 | Hurricane | 64+ | Catastrophic |
Gale Warning: Issued when winds are expected to reach 34-47 knots.
How fast is Mach 1 in knots?
Mach 1 (speed of sound) varies with temperature and altitude.
At Sea Level (59°F):
- Mach 1 ≈ 661 knots (761 mph, 1,225 km/h).
At 35,000 feet (typical cruise altitude):
- Mach 1 ≈ 573 knots (659 mph, 1,062 km/h).
Concorde Cruise Speed:
- Mach 2.0 ≈ 1,150 knots (1,323 mph).
About Foot per second (ft/s)
Is ft/s faster than mph?
No—ft/s is a smaller unit, so the number is bigger for the same speed.
- 1 mph = 1.467 ft/s
- 100 ft/s = 68 mph (the ft/s number is bigger, but it's actually slower than "100 mph")
Think of it like inches vs feet: 12 inches = 1 foot. "12" is bigger than "1", but they're the same length. Similarly, "100 ft/s" looks bigger than "68 mph", but they're the same speed.
What is the speed of sound in ft/s?
Approximately 1,125 ft/s at sea level, 68°F (767 mph, 343 m/s) = Mach 1
Temperature dependence:
- 32°F (0°C): 1,087 ft/s
- 68°F (20°C): 1,125 ft/s (standard reference)
- 86°F (30°C): 1,145 ft/s
Practical rule: "Sound travels about 1,100 feet per second"
Lightning distance trick:
- See lightning flash
- Count seconds until thunder: "one Mississippi, two Mississippi, three..."
- Multiply seconds by 1,100 feet
- Divide by 5,280 (feet per mile) to get miles
- Example: 5 seconds → 5,500 feet → ~1 mile away
Why bullets are "supersonic" or "subsonic":
- Supersonic (> 1,125 ft/s): Creates sonic boom/crack
- Subsonic (< 1,125 ft/s): No sonic crack (quieter with suppressor)
How do I convert mph to ft/s in my head?
Method 1 (rough): Multiply by 1.5
- 60 mph × 1.5 = 90 ft/s (actual: 88, close!)
- 40 mph × 1.5 = 60 ft/s (actual: 58.7, pretty close)
Method 2 (better): Use the "22/15 rule" or remember key values
- 30 mph = 44 ft/s
- 60 mph = 88 ft/s
- 90 mph = 132 ft/s
- Scale from these: 45 mph = halfway between 30 and 60 → (44+88)/2 = 66 ft/s
Method 3 (precise): Multiply by 1.467 (or 22/15)
- 50 mph × 1.467 = 73.35 ft/s
Why do bullets use ft/s instead of mph?
Four main reasons:
- Historical: US firearms industry developed using FPS system (foot-pound-second)
- Practical scale: Bullet velocities (1,000-3,000 ft/s) fit well, whereas 700-2,000 mph sounds awkward
- Short-duration events: Bullets travel for fractions of a second, so "per second" is more intuitive than "per hour"
- Ballistic calculations: Easier math for drop (inches), time of flight (milliseconds), energy (foot-pounds) when velocity is in ft/s
Example: .223 Rem bullet at 3,200 ft/s
- Distance in 0.1 seconds: 320 feet (easy mental math)
- If stated as 2,182 mph: distance in 0.1 sec requires mph × 1.467 × 0.1 = 320 feet (harder)
What is terminal velocity in ft/s?
Human skydiver:
- Belly-to-earth (stable, arms/legs spread): 176 ft/s (120 mph, 54 m/s)
- Head-down streamline (diving position): 295 ft/s (200 mph, 90 m/s)
- With parachute deployed: 15-25 ft/s (10-17 mph)—safe landing speed
Other objects:
- Raindrop (small, 1mm): 20 ft/s
- Raindrop (large, 5mm): 30 ft/s
- Baseball: 146 ft/s (100 mph)
- Penny (myth-busting): 30-50 ft/s (not lethal!)
- Bowling ball: 335 ft/s (228 mph)—dangerous!
Why terminal velocity varies: Air resistance balances weight. Bigger, heavier, or more streamlined = higher terminal velocity.
How fast is 300 ft/s in mph?
300 ft/s = 204.5 mph
Formula: 300 ft/s × 0.682 = 204.5 mph
Context: This is a common archery speed (compound bow arrow) or paintball velocity limit (280-300 ft/s)
Comparison:
- 300 ft/s = subsonic (below 1,125 ft/s speed of sound)
- 300 ft/s = 91.4 m/s (metric)
- 300 ft/s = 199 knots (marine/aviation)
What does "subsonic ammo" mean?
Subsonic ammunition: Muzzle velocity < 1,125 ft/s (speed of sound)
Why use subsonic:
- No sonic crack: Supersonic bullets create a sonic boom as they break the sound barrier—sounds like a loud "crack"
- Suppressor-friendly: With a suppressor (silencer), subsonic ammo is much quieter—only the muzzle blast is heard, not the sonic crack
- Hearing protection: Even without suppressor, subsonic is less loud
Common subsonic rounds:
- .45 ACP: 850-900 ft/s (naturally subsonic, heavy bullet)
- 9mm subsonic: 950-1,050 ft/s (special loads, lighter powder charge)
- .22 LR subsonic: 1,050-1,100 ft/s
Supersonic ammunition: Velocity > 1,125 ft/s
- Standard .223 Rem: 3,200 ft/s (almost 3× speed of sound!)
- Standard 9mm: 1,200 ft/s (just barely supersonic)
How far does a car travel in 1 second at 60 mph?
88 feet (exactly)
Breakdown:
- 60 mph = 60 miles/hour
- 60 miles/hour × 5,280 feet/mile ÷ 3,600 seconds/hour = 88 feet/second
Why this matters for safety:
- Reaction time: Average driver takes 1.5 seconds to react to hazard
- Distance during reaction: 1.5 seconds × 88 ft/s = 132 feet (before even touching brake!)
- Braking distance: Additional ~180 feet to stop (dry pavement)
- Total stopping distance: 132 + 180 = 312 feet at 60 mph
Following distance "3-second rule":
- At 60 mph, maintain 3 × 88 = 264 feet behind car ahead
- Gives 2× reaction distance (safer margin)
Can I use ft/s in scientific equations?
Yes, but you must use imperial units consistently:
Kinetic energy (imperial): KE (foot-pounds) = ½ × mass (slugs) × velocity² (ft/s)²
- 1 slug = 32.174 pounds-mass
- Or: KE (ft·lbf) = weight (lbf) × velocity² (ft/s)² / (2 × 32.2)
Force (imperial): F (pound-force) = mass (slugs) × acceleration (ft/s²)
- Or: F (lbf) = (weight in lbf / 32.2) × acceleration (ft/s²)
For scientific work, SI units (m/s, kg, Newtons, Joules) are strongly preferred:
- No slugs vs pounds confusion
- International standards require SI
- Easier unit conversions (all decimal)
Bottom line: You can use ft/s in calculations, but it's more complex than metric. For ballistics and US engineering where ft/s is standard, imperial equations exist. For research/publication, convert to m/s.
What's the difference between ft/s and ft/s²?
ft/s (feet per second): Velocity—how fast you're moving ft/s² (feet per second squared): Acceleration—how quickly your velocity changes
Example (free fall):
- Gravity acceleration: g = 32.2 ft/s²
- After 0 seconds: velocity = 0 ft/s
- After 1 second: velocity = 32.2 ft/s (acceleration added 32.2 ft/s)
- After 2 seconds: velocity = 64.4 ft/s (acceleration added another 32.2 ft/s)
- After 3 seconds: velocity = 96.6 ft/s
Car example (0-60 mph in 5 seconds):
- Change in velocity: 60 mph = 88 ft/s
- Time: 5 seconds
- Average acceleration: 88 ft/s ÷ 5 seconds = 17.6 ft/s²
Conversion Table: Knot to Foot per second
| Knot (kn) | Foot per second (ft/s) |
|---|---|
| 0.5 | 0.844 |
| 1 | 1.688 |
| 1.5 | 2.532 |
| 2 | 3.376 |
| 5 | 8.439 |
| 10 | 16.878 |
| 25 | 42.195 |
| 50 | 84.391 |
| 100 | 168.781 |
| 250 | 421.953 |
| 500 | 843.905 |
| 1,000 | 1,687.81 |
People Also Ask
How do I convert Knot to Foot per second?
To convert Knot to Foot per second, enter the value in Knot in the calculator above. The conversion will happen automatically. Use our free online converter for instant and accurate results. You can also visit our speed converter page to convert between other units in this category.
Learn more →What is the conversion factor from Knot to Foot per second?
The conversion factor depends on the specific relationship between Knot and Foot per second. You can find the exact conversion formula and factor on this page. Our calculator handles all calculations automatically. See the conversion table above for common values.
Can I convert Foot per second back to Knot?
Yes! You can easily convert Foot per second back to Knot by using the swap button (⇌) in the calculator above, or by visiting our Foot per second to Knot converter page. You can also explore other speed conversions on our category page.
Learn more →What are common uses for Knot and Foot per second?
Knot and Foot per second are both standard units used in speed measurements. They are commonly used in various applications including engineering, construction, cooking, and scientific research. Browse our speed converter for more conversion options.
For more speed conversion questions, visit our FAQ page or explore our conversion guides.
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Verified Against Authority Standards
All conversion formulas have been verified against international standards and authoritative sources to ensure maximum accuracy and reliability.
National Institute of Standards and Technology — Standards for speed and velocity measurements
Last verified: December 3, 2025