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==اصل الكلمة==
من [[لغة فرنسية|الفرنسية]] بُوسْ pouce، ومعنى الكلمة الأصلي هو [[الإبهام]]، أي الإصبع الأول لليد، وتسمى بالإنجليزية «إنش» Inch.
== التكافئ ==
{| class="wikitable" cellspacing=4 style="margin-right:0"
|+ جدول وحدات الأطوال المكافئة
! الوحدة
! بالنسبة إلى سابقة
! [[قدم]]
! [[مليمتر]]
! [[متر]]
! ملاحظات
|-
|align=center| ''[[thou (length)|thou]]'' (th)
|
|align=right| 1/12000
|align=right| 0.0254
|align=right| 0.0000254
|
: أيضا 25.4 [[ميكرون]] μm
|-
|align=center| ''بوصة'' (in)
| 1000 thou
|align=right| 1/12
|align=right| 25.4
|align=right| 0.0254
|
|-
|align=center| ''[[قدم (وحدة قياس)|قدم]]''
| 12 inches
|align=right| 1
|align=right| 304.8
|align=right| 0.3048
|
|-
|align=center| ''[[يارد]]''
| 3 قدم
|align=right| 3
|align=right| 914.4
|align=right| 0.9144
|
: Defined as exactly 0.9144 metre by the [[International yard and pound]] agreement of 1959
|-
|align=center| ''[[Chain (length)|chain]]'' (ch)
| 22 ياردة
|align=right| 66
|align=right| 20,116.8
|align=right| 20.1168
|
: The distance between the two [[wicket]]s on a [[cricket pitch]]
|-
|align=center| ''[[furlong]]'' (fur)
| 10 chains
|align=right| 660
|align=right|
|align=right| 201.168
|
: 220 ياردة
|-
|align=center| ''[[ميل]]''
| 8 furlongs
|align=right| 5,280
|align=right|
|align=right| 1,609.344
|
: 1,760 ياردة
|-
|align=center| ''[[league (unit)|league]]'' (lea)
| 3 [[ميل]]
|align=right| 15,840
|align=right|
|align=right| 4,828.032
|
: لم تعد تستخدم كوحدة رسمية في أي دولة.
|-
| style="text-align:center;" colspan="6"| '''الوحدات البحرية'''
|- valign=top
|align=center| ''[[قامة]]''
| ~2 ياردة
|align=right| 6
|align=right| 1,828.8
|align=right| 1.8288
|
: The British [[الأميرالية]] in practice used a fathom as 6 feet. This was despite its being 1/1000 of a nautical mile (i.e. 6.08 feet) until the adoption of the international nautical mile.<ref name="fath">The exact figure was 6.08 feet, but 6 feet was in use in practice. The commonly accepted definition of a fathom was always 6 feet. The conflict was inconsequential as Admiralty nautical charts designated depths shallower than 5 fathoms in feet on older imperial charts. Today, all charts worldwide are metric, except for USA Hydrographic Office charts, which use feet for all depth ranges.</ref>
|- valign=top
|align=center| ''[[cable length|cable]]''
| 100 fathoms
|align=right| 608
|align=right|
|align=right| 185.3184
|
: One tenth of a nautical mile. When in use it was approximated colloquially as 100 fathoms.
|- valign=top
|align=center| ''[[ميل بحري]]''
| 10 cables
|align=right| 6,080
|align=right|
|align=right| 1,853.184
|
: Used for measuring distances at sea. Until the adoption of the international definition of 1,852 metres in 1970, the British nautical (Admiralty) mile was defined as 6,080 feet.<ref>The [[ميل بحري]] was not readily expressible in terms of any of the intermediate units, because it was derived from the circumference of the Earth (like the original metre).</ref>
|-
| style="text-align:center;" colspan="6"| '''Gunter's survey units (17th century onwards)'''
|-
|align=center| ''[[link (unit)|link]]''
| 7.92 inches
|align=right| 66/100
|align=right| 201.168
|align=right| 0.201168
|
: 1/100 of a chain
|-
|align=center| ''[[قصبة (وحدة قياس)]]''
| 25 links
|align=right| 66/4<!-- odd fraction is intentional; it is to show the relative value of the unit more clearly in this subsection of the table -->
|align=right| 5,029.2
|align=right| 5.0292
|
: The rod is also called ''pole'' or ''perch'' and equal to 5.5 ياردة
|-
|align=center| ''[[chain (unit)|chain]]''
| 4 rods
|align=right| 66
|align=right|
|align=right| 20.1168
|
: 100 links or 1/10 of a furlong
|}
===المساحة===
{| class="wikitable" cellspacing=3 style="margin-right:0"
|+ المساحة
! الوحدة
! بالنسبة لوحدات الطول
! قدم مربع
! قضبان مربعة
! ميل مربع
! متر مربع
! هكتار
! ملاحظات
|-
| ''[[Perch (unit of measure)#Area|perch]]''
|align=center| {{لا لف|1 rod ×}} 1 rod
|align=right| 272.25
|align=right| 1
|align=right| 1/102400
|align=right| 25.29285264
|align=right| 0.002529
|
: Although the proper term is ''square rod'', for centuries this unit has been called a ''pole'' or ''perch'' or, more properly, ''square pole'' or ''square perch''.
|-
| ''[[Rood (unit)|rood]]''
|align=center| {{لا لف|1 furlong ×}} 1 rod<ref>{{cite web |url=http://ts.nist.gov/WeightsAndMeasures/Publications/upload/h4402_appenc.pdf |title= Appendix C: General Tables of Units of Measurements|accessdate=4 January 2007|format=PDF |publisher=NIST}} {{وصلة مكسورة|تاريخ=يوليو 2012}}</ref>
|align=right| 10,890
|align=right| 40
|align=right| 1/2560
|align=right| 1,011.7141056
|align=right| 0.1012
|
: القضيب = 1,210 ياردة مربعة.
|-
| ''[[الـفدان]]''
|align=center| 1 furlong × 1 chain
|align=right| 43,560
|align=right| 160
|align=right| 1/640
|align=right| 4,046.8564224
|align=right| 0.4047
|
: واحد فدان هو 4،840 ياردة مربعة
|-
|colspan=8|'''Note:''' All equivalences are exact except hectares, which are accurate to 4 significant figures.
|}
== انظر ايضا ==
* [[طول|الطول]] وحدته [[متر|المتر]]
* [[زمن|الزمن]] وحدته [[ثانية|الثانية]]
* [[كتلة|الكتلة]] وحدتها [[كيلوغرام|الكيلوغرام]]
* شدة [[تيار|التيار]] وحدتها [[أمبير|الأمبير]]
* [[درجة الحرارة]] المطلقة وحدتها [[كلفن|الكلفن]]
* شدة ال[[إضاءة]] وحدتها [[شمعة معيارية]]
* [[وحدة طاقة]]
* [[وحدة ضغط]]
* [[وحدة سرعة]]
== مراجع ==
{{مراجع}}
== وصلات خارجية ==
*
{{شريط بوابات|فيزياء}}
| 