The difficulty here is that indicated airspeed is a calculation that assumes sea-level air density. Before using any of the provided tools or data you must check with a competent authority to validate its correctness. Note that for altitudes from 35,000 ft to 60,000 ft the true airspeed for a given mach number does not change even though the indicated airspeed decreases -- this is because between 35,000 ft and 60,000 ft the model atmosphere is in the tropopause, where the temperature does not change, so neither does the speed of sound, or the true airspeed for a given Mach number. Speed of Sound Equation: v s = 643.855 x (T/273.15) 0.5. Mach 1 vs. altitude in English Units Yeager hit mach 1.06, or 698 mph on the flight where he broke the sound barrier. At 20 °C (68 °F), the speed of sound in air is about 343 metres per second (1,235 km/h; 1,125 ft/s; 767 mph; 667 kn), or a kilometre in 2.9 s or a mile in 4.7 s.It depends strongly on temperature as well as the medium through which a sound wave is propagating. The chart on page 9 of this PDF shows you how to convert between IAS and TAS at a given mach number. Contact | KylesConverter.com is not responsible for any inaccurate data provided. Mach to Knots formula Knots. At 45,000', it's 659 mph (573 knots), also dependent on temperature. Sound - Frequency, Wavelength and Octave - An introduction to the nature of sound - frequency, wavelength and octave; U.S. Standard Atmosphere - Properties of US standard atmosphere ranging -5000 to 250000 ft altitude; Velocity of Sound - Online Calculator - An online Speed of Sound calculator fighter-planes.com says the speed of sound at 30,000' is 678 mph (589 knots), though it depends on temperature. Knots are a speed measurement that is nautical miles per hour. Yeager hit mach 1.06, or 698 mph on the flight where he broke the sound barrier. Units, Conversion & Calculation Blog | 2009-2020, http://www.kylesconverter.com/speed-or-velocity/knots-to-speed-of-sound-in-air, Creative Commons Attribution 3.0 Unported License, 1 Knots to Speed Of Sound In Air = 0.0015, 70 Knots to Speed Of Sound In Air = 0.1047, 80 Knots to Speed Of Sound In Air = 0.1196, 3 Knots to Speed Of Sound In Air = 0.0045, 90 Knots to Speed Of Sound In Air = 0.1346, 100 Knots to Speed Of Sound In Air = 0.1495, 5 Knots to Speed Of Sound In Air = 0.0075, 200 Knots to Speed Of Sound In Air = 0.2991, 300 Knots to Speed Of Sound In Air = 0.4486, 7 Knots to Speed Of Sound In Air = 0.0105, 400 Knots to Speed Of Sound In Air = 0.5982, 500 Knots to Speed Of Sound In Air = 0.7477, 9 Knots to Speed Of Sound In Air = 0.0135, 600 Knots to Speed Of Sound In Air = 0.8973, 10 Knots to Speed Of Sound In Air = 0.015, 800 Knots to Speed Of Sound In Air = 1.1964, 20 Knots to Speed Of Sound In Air = 0.0299, 900 Knots to Speed Of Sound In Air = 1.3459, 30 Knots to Speed Of Sound In Air = 0.0449, 1,000 Knots to Speed Of Sound In Air = 1.4955, 40 Knots to Speed Of Sound In Air = 0.0598, 10,000 Knots to Speed Of Sound In Air = 14.9548, 50 Knots to Speed Of Sound In Air = 0.0748, 100,000 Knots to Speed Of Sound In Air = 149.5478, 60 Knots to Speed Of Sound In Air = 0.0897, 1,000,000 Knots to Speed Of Sound In Air = 1495.478. The conversions on this site will not be accurate enough for all applications. In SI units, R for air = 287 J/kg*K, γ = 1.4. And also, the Bell X-1 was dropped from around 29,000 feet. Where: v s = Speed of Sound (knots) T = temperature (Kelvin) Speed of Sound at a known temperature and density of air kt mach (speed of sound) 0.0015130718954118 Ma Conversion base : 1 kt = 0.0015130718954118 Ma . meters per second (mps) kilometers per second (kps) kilometers per hour (kph) … Speed of Sound table chart including Speed of Sound at a known temperature and density of air, Speed of Sound vs Density of Air . Remember that you always can change the units of speed of sound: mph, ft/s, m/s, km/h, even to knots if you wish to. Press J to jump to the feed. 2009-2020, http://www.kylesconverter.com/speed-or-velocity/speed-of-sound-in-air-to-knots, Speed Of Sound In Air to Millimeters per Microsecond, Speed Of Sound In Air to Meters per Millisecond, Speed Of Sound In Air to Kilometres per Hour, Speed Of Sound In Air to Meters per Second, Creative Commons Attribution 3.0 Unported License, 1 Speed Of Sound In Air to Knots = 668.6825, 70 Speed Of Sound In Air to Knots = 46807.7754, 2 Speed Of Sound In Air to Knots = 1337.365, 80 Speed Of Sound In Air to Knots = 53494.6004, 3 Speed Of Sound In Air to Knots = 2006.0475, 90 Speed Of Sound In Air to Knots = 60181.4255, 4 Speed Of Sound In Air to Knots = 2674.73, 100 Speed Of Sound In Air to Knots = 66868.2505, 5 Speed Of Sound In Air to Knots = 3343.4125, 200 Speed Of Sound In Air to Knots = 133736.5011, 6 Speed Of Sound In Air to Knots = 4012.095, 300 Speed Of Sound In Air to Knots = 200604.7516, 7 Speed Of Sound In Air to Knots = 4680.7775, 400 Speed Of Sound In Air to Knots = 267473.0022, 8 Speed Of Sound In Air to Knots = 5349.46, 500 Speed Of Sound In Air to Knots = 334341.2527, 9 Speed Of Sound In Air to Knots = 6018.1425, 600 Speed Of Sound In Air to Knots = 401209.5032, 10 Speed Of Sound In Air to Knots = 6686.8251, 800 Speed Of Sound In Air to Knots = 534946.0043, 20 Speed Of Sound In Air to Knots = 13373.6501, 900 Speed Of Sound In Air to Knots = 601814.2549, 30 Speed Of Sound In Air to Knots = 20060.4752, 1,000 Speed Of Sound In Air to Knots = 668682.5054, 40 Speed Of Sound In Air to Knots = 26747.3002, 10,000 Speed Of Sound In Air to Knots = 6686825.054, 50 Speed Of Sound In Air to Knots = 33434.1253, 100,000 Speed Of Sound In Air to Knots = 66868250.54, 60 Speed Of Sound In Air to Knots = 40120.9503, 1,000,000 Speed Of Sound In Air to Knots = 668682505.4. Units, Conversion & Calculation Blog | The conversions on this site will not be accurate enough for all applications. Contact | You are currently converting speed units from knot to mach (speed of sound) 1 kt = 0.0015130718954118 Ma. The chart on page 9 of this PDF shows you how to convert between IAS and TAS at a given mach number. Press question mark to learn the rest of the keyboard shortcuts. Mach is typically used in aviation and space exploration. Unit Conversions | The standard atmosphere is -48 degrees F / -44 degrees C / 229 K at an altitude of 30,000 ft. The speed of sound is definitely not 420 knots at 30,000 ft. To learn how we use any data we collect about you see our privacy policy. 40,000 feet is the usual altitude. Please share if you found this tool useful: (adsbygoogle = window.adsbygoogle || []).push({}); A reasonable effort has been made to ensure the accuracy of the information presented on this web site. Let's plug in T = 229 K and we get c = 303 m/s = 678 mph = 589 knots. Speed of Sound miles/hour knots 0 * 29.92 15.000 59.000 760 661 5,000 24.89 5.094 41.200 747 649 10,000 20.58 -4.812 23.300 733 638 15,000 16.88 -14.718 5.500 720 626 20,000 13.75 -24.624 -12.300 707 614 25,000 11.10 -34.530 -30.200 692 601 30,000 8.89 -44.436 -48.000 677 589 35,000 7.04 -54.342 -65.800 663 576 40,000 5.54 -56.500 -69.700 659 573 45,000 4.35 -56.500 … It seems to make sense that Chuck Yeager would’ve had to only go about 500 kn to achieve Mach 1.06. The speed is equal to 4960 ft/s this time. The speed of sound calculator displays a speed of sound in water, It's 4672 ft/s. Note that for altitudes from 35,000 ft to 60,000 ft the true airspeed for a given mach number does not change even though the indicated airspeed decreases -- this is because between 35,000 ft and 60,000 ft the model atmosphere is in the tropopause, where the temperature does not change, so neither does the speed of sound, or the true airspeed for a given Mach number. 30 Speed Of Sound In Air to Knots = 20060.4752: 1,000 Speed Of Sound In Air to Knots = 668682.5054: 40 Speed Of Sound In Air to Knots = 26747.3002: 10,000 Speed Of Sound In Air to Knots = 6686825.054: 50 Speed Of Sound In Air to Knots = 33434.1253: 100,000 Speed Of Sound In Air to Knots = 66868250.54: 60 Speed Of Sound In Air to Knots = 40120.9503 Please enter numbers only. New comments cannot be posted and votes cannot be cast. Calculators | Edit: he actually flew to 45,000 feet, so it seems he could have gone even slower to reach Mach 1. 661 mph is the Speed of Sound at 35,000 feet (GC4CNPT) was created by bernsa on 6/9/2013.