Na'urorin da aka fi amfani da su da kuma masu canzawa ga masu yin simintin masana'antu

Raka'a biyu da aka saba amfani da su don yin gyaran injinan masana'antu:
● Raka'o'in tsayi: inci ɗaya daidai yake da jimillar tsawon kunnuwa uku na sha'ir;
● Nauyin nauyi: fam ɗaya daidai yake da nauyin sha'ir sau 7,000 da aka ɗauka daga tsakiyar kunne;

Dangane da tsayi a cikin rukunin imperial: Bayan 1959, inci a cikin tsarin imperial na Amurka da inci a cikin tsarin Birtaniya an daidaita su zuwa 25.4 mm don amfanin kimiyya da kasuwanci, amma tsarin Amurka ya riƙe "inci da aka auna" da aka yi amfani da shi a cikin ma'auni kaɗan daban-daban.
Inci 1 = santimita 2.54 (cm)
ƙafa 1 = inci 12 = 30.48 cm
Yadi 1 = ƙafa 3 = santimita 91.44 (cm)
● Mil 1 = yadi 1760 = kilomita 1.609344 (km)

Canza nauyin raka'a na Ingilishi:
● Hatsi 1 = 64.8 milligrams
Drachm 1 = 1/16 oza = gram 1.77
Oza 1 = 1/16 fam = gram 28.3
● Fam 1 = hatsi 7000 = gram 454
Dutse 1 = fam 14 = kilogiram 6.35
● Kwata 1 = Dutse 2 = Fam 28 = Kilogram 12.7
● Kwata 1 = Kwata 4 = Fam 112 = Kilogram 50.8
Tan 1 = kwata 20 = fam 2240 = kilogiram 1016

Sauya raka'a yana buƙatar tsari da aka saba da shi, idan muka ga ƙarin, ƙidaya fiye da haka, ko mutane suna ba ku raka'o'in cikin gida ko na ƙasashen waje, za ku iya canzawa cikin sauri zuwa raka'o'in da kuka saba da su. Idan kuna cikin masana'antar masu yin simintin masana'antu, sau da yawa za ku haɗu da inci da santimita, milimita tsakanin juyawa; da nau'ikan raka'a tsakanin juyawa a cikin aikin yau da kullun na ƙasa da haka.