Aunin saurin mota yana daidaita bukatun doka, aminci, da gwajin aiki a fadin ma'auni daban-daban na yanki.

• **Iyakokin sauri na duniya:** Birni 30–60 km/h (20–37 mph); manyan hanyoyi 80–130 km/h (50–81 mph); Autobahn na Jamus yana da sassan da ba a iyakance su ba
• **Ma'aunin aiki:** Hanzarin 0–100 km/h (0–60 mph) shine ma'aunin masana'antu; manyan motoci suna cimma wannan a ƙasa da daƙiƙa 3
• **Tilasta sauri:** Bindigogin radar suna auna sauri ta amfani da canjin Doppler; daidaiton da aka saba shine ±2 km/h (±1 mph)
• **Gudun GPS:** Sun fi daidai fiye da gudun inji (waɗanda za su iya karantawa da 5–10% sama don iyakokin aminci)
• **Hanyoyin tsere:** Motocin F1 suna kaiwa 370 km/h (230 mph); mafi girman sauri an iyakance shi ne ta hanyar ciniki tsakanin jan hankali da ƙarfin ƙasa
• **Motocin lantarki:** Torque na nan take yana ba da damar saurin 0–100 km/h fiye da motocin ICE masu kama da juna duk da cewa galibi suna da ƙananan saurin gudu

Aunin saurin jirgin sama yana bambanta tsakanin saurin iska da aka nuna (IAS), ainihin saurin iska (TAS), da gudun ƙasa (GS) — masu mahimmanci don aminci da kewaya.

• **IAS (Saurin Iska da Aka Nuna):** Abin da matukin jirgi ke gani; dangane da matsin lamba mai ƙarfi. Ana amfani da shi don iyakokin aikin jirgin sama (gudun tsayawa, mafi girman sauri)
• **TAS (Ainihin Saurin Iska):** Ainihin sauri ta cikin iska; ya fi IAS girma a tsawo saboda ƙarancin iska. TAS = IAS × √(ρ₀/ρ)
• **Gudun Ƙasa (GS):** Sauri a kan ƙasa; TAS ± iska. Iska mai goyon baya tana ƙara GS; iska mai karo tana rage ta. Mai mahimmanci don kewaya da shirin mai
• **Lambar Mach:** Aikin jirgin sama yana canzawa sosai kusa da Ma = 1 (yankin transonic); igiyoyin girgiza suna samuwa, jan hankali yana ƙaruwa sosai
• **Tafiyar jirgin sama:** Yawanci Ma 0.78–0.85 (mafi kyawun ingancin mai); daidai da ≈850–900 km/h (530–560 mph) a tsawo na tafiya
• **Jiragen sama na soja:** Mafi girman saurin F-15 Ma 2.5+ (2,655 km/h / 1,650 mph); SR-71 Blackbird ya riƙe rikodin Ma 3.3 (3,540 km/h / 2,200 mph)
• **Saurin sake shigowa:** Jirgin sama na sararin samaniya ya shiga sararin samaniya a Ma 25 (8,000 m/s, 28,000 km/h, 17,500 mph) — zafi mai tsanani yana buƙatar kariya ta zafi

Aunin saurin teku yana amfani da knots da mil na ruwa — raka'o'in da ke da alaƙa kai tsaye da lissafin duniya don kewaya taswira ba tare da matsala ba.

• **Me yasa mil na ruwa?** Mil 1 na ruwa = minti 1 na latitude = mita 1,852 daidai (ta hanyar yarjejeniyar duniya 1929). Yana sa zanen taswira ya zama mai sauƙin fahimta
• **Asalin knots:** Matukan jirgin ruwa sun yi amfani da 'layin katako' tare da kulli da aka ɗaure a lokaci-lokaci. Adadin kulli da ke wucewa a baya a cikin ƙayyadadden lokaci = sauri a cikin knots
• **Saurin jiragen ruwa:** Jiragen ruwa na kwantena suna tafiya a 20–25 kn (37–46 km/h); jiragen ruwa na yawon buɗe ido 18–22 kn; jirgin ruwa mafi sauri na fasinja (SS United States) ya kai 38.32 kn (71 km/h)
• **Tasirin guguwa:** Gulf Stream yana gudana a 2–5 kn zuwa gabas; jiragen ruwa suna amfani da ko guje wa guguwa don adana mai da lokaci
• **Kimanta kewaya:** Kewaya ta hanyar bin sauri da alkibla a kan lokaci. Daidaito ya dogara ne da ainihin awo na sauri da ramuwar gayya ga guguwa
• **Sauri ta cikin ruwa vs a kan ƙasa:** GPS yana ba da sauri a kan ƙasa; katako yana auna sauri ta cikin ruwa. Bambancin yana bayyana ƙarfin/alkiblar guguwa

Aunin kimiyya yana amfani da m/s da saurin tunani waɗanda ke bayyana tsarin jiki — daga motsin kwayoyin halitta zuwa saurin sararin samaniya.

• **Gudun sauti (iska, 20°C):** 343 m/s (1,235 km/h, 767 mph). Yana canzawa da √T; yana ƙaruwa da ~0.6 m/s a kowace °C. Ana amfani da shi don ayyana lambar Mach
• **Gudun sauti (ruwa):** ≈1,480 m/s (5,330 km/h) — sau 4.3 da sauri fiye da iska. Sonar da gano jirgin ruwa na karkashin ruwa sun dogara ne da wannan
• **Gudun sauti (ƙarfe):** ≈5,960 m/s (21,460 km/h) — sau 17 da sauri fiye da iska. Gwajin ultrasonic yana amfani da wannan don gano lahani
• **Saurin kubuta (Duniya):** 11.2 km/s (40,320 km/h, 25,000 mph) — mafi ƙarancin sauri don kubuta daga nauyin duniya ba tare da turawa ba
• **Saurin kewaya (LEO):** ≈7.8 km/s (28,000 km/h, 17,500 mph) — saurin kewaya na ISS; yana daidaita nauyi da ƙarfin centrifugal
• **Juyawar duniya:** Equator yana motsawa a 465 m/s (1,674 km/h, 1,040 mph) zuwa gabas; roket da aka harba zuwa gabas suna amfani da shi don ƙarin sauri
• **Gudun haske (c):** 299,792,458 m/s daidai (ta ma'ana). Iyakar sauri ta duniya; babu wani abu mai nauyi da zai iya kaiwa c. Fadada lokaci yana faruwa a saurin da ya danganci (>0.1c)
• **Masu hanzarta kwayoyin halitta:** Babban Hadron Collider yana hanzarta protons zuwa 0.9999999c (≈299,792,455 m/s) — makamashi yana ƙaruwa sosai kusa da c

• **Furlong a cikin makonni biyu:** Raka'a mai ban dariya = 1 furlong (⅓ mil) a cikin kwanaki 14 ≈ 0.000166 m/s (0.6 m/h). Ana amfani da shi a cikin wasannin kimiyyar lissafi da ayyukan Douglas Adams
• **League a awa:** Saurin tafiya na tsakiya; 1 league ≈ mil 3 (4.8 km), don haka 1 league/h ≈ 1.3 m/s (4.8 km/h) — saurin tafiya na yau da kullun. Ya bayyana a cikin litattafan Jules Verne
• **Tafiyar Roman (passus):** Mil na Roman = tafiya 1,000 (≈1.48 km). Sojojin da ke tafiya suna rufe mil 20–30 na Roman a rana (30–45 km/rana, ≈1.5 m/s a matsakaita)
• **Verst a awa (Rasha):** 1 verst = 1.0668 km; ana amfani da shi a Rasha a ƙarni na 19. An faɗi saurin jiragen ƙasa a cikin versts/awa (tunani a cikin Yaƙi da Salama)
• **Li a rana (Sinanci):** Li na gargajiya na Sin ≈ 0.5 km; ana auna tafiye-tafiye masu nisa a cikin li/rana. Ayarin Siliki: 30–50 li/rana (15–25 km/rana)
• **Knot na Admiralty (kafin 1954):** Ma'anar Birtaniya 6,080 ft/h = 1.85318 km/h (idan aka kwatanta da 1.852 km/h na zamani). Ƙananan bambanci ya haifar da kurakuran kewaya; an daidaita shi a 1954

• m/s × 3.6 → km/h; m/s × 2.23694 → mph
• Zagaye da hankali don rahoton titi/sufurin jiragen sama
• Yi amfani da lambobi masu ma'ana don aikin kimiyya

• 1600s
  An yi amfani da layin katako mai kulli a teku don kimanta sauri
• 1900s
  Gudun mota ya zama ruwan dare
• 1947
  Tashi na farko mai saurin sauti (Bell X‑1)
• 1969
  Tashi na farko na Concorde (jirgin sama mai saurin sauti)
• 1997
  ThrustSSC ya karya katangar sauti a ƙasa