| Factor (m/s) | Value (m/s) | Value (km/h) | Value (mph) | Value (c) | Item | 
|---|
| 10−18 | 2.2×10−18 | 7.8×10−18 | 4.9×10−18 |  | Expansion rate between 2 points in free space 1 m apart under Hubble's law. | 
| 10−13 | 1×10−13 | 3×10−13 | 2×10−13 |  | Rate of erosion of Bedrock.[1] | 
| 10−11 | 9.8×10−11 | 3.5×10−10 | 2.2×10−10 |  | Rate of global sea level rise in 1993–2003 (3.1 mm/yr).[2] | 
| 10−10 | 3×10−10 to 3×10−9 | 1×10−9 to 1×10−8 | 7×10−10 to 7×10−9 |  | Typical relative speed of continental drift. | 
| 10−9 | 1.3×10−9 | 4.68×10−9 | 2.9×10−9 |  | Average rate of the Moon receding from the Earth (approx. 38 mm/yr). | 
| 4.8×10−9 | 1.7×10−8 | 1.1×10−8 |  | Human hair growth (average rate—note that there is a great range of variation). | 
| 10−6 | 1.52×10−6 | 5.4×10−6 | 3.4×10−6 |  | Speed of a cellular vesicle propelled by a motor protein.[3] | 
| 10−5 | 1.4×10−5 | 5.0×10−5 | 3.1×10−5 |  | Growth rate of bamboo, the fastest-growing woody plant, over 24 hours.[4] | 
| 10−4 | 4.0×10−4 | 1.4×10−3 | 8.9×10−4 |  | Speed of Jakobshavn Isbræ, one of the fastest glaciers, in 2003.[5] | 
| 6×10−4 | 2.2×10−3 | 1.3×10−3 |  | Typical speed of Thiovulum majus, the fastest-swimming bacterium.[6] | 
| 10−3 | 0.00275 | 0.00990 | 0.00615 |  | World record speed of the fastest snail in the Congham, UK.[7] | 
| 10−2 | 0.0476 | 0.171 | 0.106 |  | Compact cassette tape speed.[8] | 
| 0.080 | 0.29 | 0.18 |  | The top speed of a sloth. | 
| 10−1 | 0.2778 | 1 | 0.6214 |  | 1 km/hour. | 
| 0.44704 | 1.609344 | 1 |  | 1 mph. | 
| 0.5144 | 1.852 | 1.151 |  | 1 knot (nautical mile per hour) | 
| 100 | 1.2 | 4.32 | 2.68 |  | Typical scanning speed of an audio compact disc; the speed of signals (action potentials) traveling along axons in the human cortex. | 
| 1–1.5 | 3.6–5.4 | 2.2–3.4 |  | Average walking speed—below a speed of about 2 m/s, it is more efficient to walk than to run, but above that speed, it is more efficient to run. | 
| 2.39 | 8.53 | 5.35 |  | World record time 50m freestyle swim | 
| 5.72 | 20.42 | 12.80 |  | World record time marathon | 
| 6–7 | 20–25 | 12–15 |  | Comfortable bicycling speed. | 
| 101 | 10.438 | 37.578 | 23.35 |  | Average speed of Jamaican athlete Usain Bolt while setting the 100m world record in Berlin on 16 August 2009. | 
| 12.42 | 44.72 | 27.78 |  | Top speed reached by Bolt during the same race. | 
| 8–14 | 30–50 | 18–31 |  | Typical residential speed limit; top speed of a running cat or dog. | 
| 14 | 50 | 31 |  | Typical speed of road-race cyclist. | 
| 17 | 60 | 37 |  | Typical speed of thoroughbred racehorse or racing greyhound. | 
| 5–25 | 18–90 | 11–56 |  | Speed of propagation for unmyelinated sensory neurons. | 
| 30 | 110 | 70 |  | Typical speed of car (freeway); cheetah—fastest of all terrestrial animals; sailfish—fastest fish; speed of go-fast boat. | 
| 37.16 | 133.78 | 83.13 |  | Land speed record for a human powered vehicle.[9] | 
| 40 | 140 | 90 |  | Typical peak speed of a local service train (or intercity on lower standard tracks). | 
| 54 | 195 | 122 |  | Maximum speed a human can attain during a face-down free-fall. | 
| 67 | 240 | 149 |  | The top speed of the world's fastest roller coaster, Formula Rossa. | 
| 90 | 320 | 200 |  | Typical speed of a modern high-speed train (e.g. latest generation of production TGV); a diving peregrine falcon—fastest bird; 320 km/h or 200 mph is a parameter sometimes used in defining a supercar.[10] | 
| 91 | 328 | 204 |  | Fastest recorded ball (a golf ball) in sports.[11] | 
| 102 | 103 | 370 | 230 |  | Speed of super torpedo VA-111 Shkval. | 
| 103.5 | 372.6 | 231.5 |  | Maximum speed recorded by a Formula One car. Set by Juan Pablo Montoya during the 2005 Italian Grand Prix at Monza in a McLaren MP4-20. | 
| 105.5 | 379.8 | 236 |  | Maximum speed of a Ferrari F50 GT1. | 
| 113 | 408 | 254 |  | Fastest non-tornadic wind gust recorded on Earth - at Barrow Island, Australia on 1996-04-10 during Severe Tropical Cyclone Olivia.[12] | 
| 119.742 | 431.072 | 267.86 |  | Maximum speed of the Bugatti Veyron Super Sport (currently the fastest production car in the world). | 
| 120 | 432 | 270 |  | Speed of propagation for mammalian motor neurons. | 
| 130 | 468 | 290 |  | Wind speed of a powerful tornado. | 
| 150.6 | 539 | 337 |  | Top speed of an internal-combustion-powered NHRA Top Fuel Dragster. | 
| 157 | 575 | 351 |  | Top speed of experimental test TGV train in 2007. | 
| 161 | 580 | 360 |  | Top speed of JR-Maglev in 2003. | 
| 250 | 900 | 560 |  | Typical cruising speed of a modern jet airliner, e.g. an Airbus A380. | 
| 314 | 1,130 | 702 |  | Top speed of any World War II-era aircraft, the Me 163B V18 set on July 6, 1944. | 
| 320 | 1,200 | 720 |  | The speed of a typical .22 LR bullet. | 
| 340.3 | 1,225 | 761 |  | Speed of sound in standard atmosphere (15 °C and 1 atm). | 
| 344.66 | 1,240.77 | 770.98 |  | Max speed reached by the jet-propelled car ThrustSSC in 1997—Land speed record.[13] | 
| 373 | 1,342.8 | 833.9 |  | Highest speed recorded during a free fall set by Felix Baumgartner. | 
| 428 | 1,540.8 | 957 |  | Max speed of Bell X-1. | 
| 464 | 1,670 | 1,040 |  | Speed of Earth's rotation at the equator. | 
| 603 | 2,170.8 | 1,350 |  | Speed of the Concorde airliner. | 
| 975 | 3,510 | 2,180 |  | Muzzle velocity of M16 rifle. | 
| 981 | 3,532 | 2,194 |  | SR-71 Blackbird, the fastest aircraft driven by a mechanical jet engine. | 
|
| 103 | 1,400 | 5,040 | 3,100 |  | Speed of the Space Shuttle when the solid rocket boosters separate. | 
| 1,500 | 5,400 | 3,400 |  | Speed of sound in water or in soft tissue.[14] | 
| 1,789 | 6,443 | 4,002 |  | Speed of BrahMos II hypersonic cruise missile | 
| 2,000 | 7,200 | 4,500 |  | Estimated speed of a thermal neutron. | 
| 2,019 | 7,268.4 | 4,516 |  | Speed of the North American X-15 rocket plane. | 
| 2,375 | 8,550 | 5,345 |  | Escape velocity from Moon. | 
| 2,700 | 9,600 | 6,000 |  | Speed of wind on exoplanet HD 189733 b.[15] | 
| 2,885 | 10,385 | 6,453 |  | Top speed of the fastest rocket sled.[16] | 
| 3,373 | 12,144 | 7,546 |  | Speed of the X-43 rocket/scramjet plane. | 
| 4,500 | 16,000 | 10,000 |  | A typical value for the specific impulse of current rockets. | 
| 7,700 | 27,700 | 17,200 |  | Speed of International Space Station and typical speed of other satellites such as the Space Shuttle in low Earth orbit. | 
| 7,777 | 28,000 | 17,400 |  | Speed of propagation of the explosion in a detonating cord. | 
| 104 | 11,107 | 39,985.2 | 24,846 | 0.00004 c | Speed of Apollo 10 – high speed record for human-crewed vehicle. | 
| 11,200 | 40,320 | 25,100 | 0.00004 c | Escape velocity from Earth. | 
| 16,100 | 57,900 | 36,000 | 0.00005 c | Fastest projectile velocity (1994).[17] | 
| 16,210 | 58,356 | 36,261 | 0.00005 c | Escape speed from Earth by NASA New Horizons spacecraft—Fastest escape velocity. | 
| 17,000 | 61,000 | 38,000 | 0.00006 c | The approximate speed of the Voyager 1 probe relative to the sun, when it exited the Solar System.[18] | 
| 29,800 | 107,280 | 66,700 | 0.00010 c | Speed of the Earth in orbit around the Sun. | 
| 47,800 | 172,100 | 106,900 | 0.00016 c | Atmospheric entry speed of the Galileo atmospheric probe—Fastest controlled atmospheric entry for a man-made object. | 
| 70,220 | 252,800 | 157,100 | 0.00023 c | Speed of the Helios 2 solar probe—Fastest man-made object. | 
| 105 | 140,000 | 540,000 | 313,170 | 0.00047 c | Approaching velocity of Messier 98 to our galaxy. | 
| 200,000 | 700,000 | 450,000 | 0.00070 c | Orbital speed of the solar system in the Milky Way galaxy. | 
| 440,000 | 1,600,000 | 980,000 | 0.0015 c | Typical speed of the stepped leader of lightning (cf. return stroke below).[19] | 
| 450,000 | 1,600,000 | 1,000,000 | 0.0015 c | Typical speed of a particle of the solar wind, relative to the Sun. | 
| 552,000 | 1,990,000 | 1,230,000 | 0.0018 c | Speed of the Milky Way, relative to the cosmic microwave background. | 
| 617,700 | 2,224,000 | 1,382,000 | 0.0021 c | Escape velocity from the surface of the Sun. | 
| 106 | 1,000,000 | 3,600,000 | 2,200,000 | 0.0030 c | Typical speed of a Moreton wave across the surface of the Sun. | 
| 1,610,000 | 5,800,000 | 3,600,000 | 0.0054 c | Speed of hypervelocity star PSR B2224+65, which currently seems to be leaving the Milky Way. | 
| 5,000,000 | 18,000,000 | 11,000,000 | 0.017 c | Estimated minimum speed of star S2 at its closest approach to Sagittarius A*.[20] | 
| 107 | 14,000,000 | 50,000,000 | 31,000,000 | 0.047 c | Typical speed of a fast neutron. | 
| 30,000,000 | 100,000,000 | 70,000,000 | 0.1 c | Typical speed of an electron in a cathode ray tube. | 
| 108 | 100,000,000 | 360,000,000 | 220,000,000 | 0.3 c | The escape velocity of a neutron star. | 
| 100,000,000 | 360,000,000 | 220,000,000 | 0.3 c | Typical speed of the return stroke of lightning (cf. stepped leader above).[21] | 
| 124,000,000 | 447,000,000 | 277,000,000 | 0.4 c | Speed of light in a diamond (Refractive index 2.417). | 
| 200,000,000 | 720,000,000 | 440,000,000 | 0.7 c | Speed of a signal in an optical fiber. | 
| 299,792,456 | 1,079,252,840 | 670,615,282 | 0.999 c | Speed of the 7 TeV protons in the Large Hadron Collider at full power.[22] | 
| 299,792,458 − 1.5×10−15 | 1,079,252,848.8 − 5.4×10−15 | 670,616,629.4 | 1 − 4.9×10−24 c | Speed of the Oh-My-God particle ultra-high-energy cosmic ray.[23] | 
| 299,792,458 | 1,079,252,848.8 | 670,616,629.4 | 1 c | Speed of light or other electromagnetic radiation in a vacuum. Also, Planck speed. |